Why is the English font larger than the Arabic on Web pages?

Following the post "Avoiding word shuffling when writing English within Arabic text", another issue that Arabic web editors face when they publish web pages that contain both Arabic and English text is that the English text is usually larger than the Arabic text making the two languages seem odd and unbalanced.

I remedy this by increasing the size of the Arabic text to make it look more balanced with the English text. But this adds extra work and it doesn't seem like a reasonable thing to ask people to continually do.

I did notice, though, that there are some fonts in which the Arabic is similar to the English in size.

I did an experiment to see what fonts are closer together in size. What I found was that only the Courier font in Arabic has a size similar to the English font.

Courier however is not a suitable font for writing articles. It is neither modern nor legible.

It is perhaps something that needs to be adjusted by tech companies like Microsoft and organizations for Web standards such as the World Wide Web Consortium (W3C) and the Unicode Consortium.

I would be interested to know how other people deal with the issue of Arabic and English font size imbalance.

Here is how the fonts available in blogger appear for both Arabic and English text:

Arial
"لَقَدْ خَلَقْنَا الْإِنْسَانَ فِي أَحْسَنِ تَقْوِيمٍ"(التين: 4)
"We have indeed created man in the best of molds" (94:4)

Courier
"لَقَدْ خَلَقْنَا الْإِنْسَانَ فِي أَحْسَنِ تَقْوِيمٍ"(التين: 4)
"We have indeed created man in the best of molds" (94:4)

Georgia
"لَقَدْ خَلَقْنَا الْإِنْسَانَ فِي أَحْسَنِ تَقْوِيمٍ" (التين: 4)
"We have indeed created man in the best of molds" (94:4)

Lucida Grande
"لَقَدْ خَلَقْنَا الْإِنْسَانَ فِي أَحْسَنِ تَقْوِيمٍ" (التين: 4)
"We have indeed created man in the best of molds" (94:4)

Times
"لَقَدْ خَلَقْنَا الْإِنْسَانَ فِي أَحْسَنِ تَقْوِيمٍ" (التين: 4)

"We have indeed created man in the best of molds" (94:4)

Trebuchet
"لَقَدْ خَلَقْنَا الْإِنْسَانَ فِي أَحْسَنِ تَقْوِيمٍ" (التين: 4)

"We have indeed created man in the best of molds" (94:4)

Verdana
"لَقَدْ خَلَقْنَا الْإِنْسَانَ فِي أَحْسَنِ تَقْوِيمٍ" (التين: 4)
"We have indeed created man in the best of molds" (94:4)