If Vermont found 12 ads on the first web page and twice as many ads on the second web page as the first web page, he found 12*2 = <<12*2=24>>24 ads on the second web page.
The first and the second web page had a total of 12+24 =<<12+24=36>>36
Vermont also found 24 more ads on the third web page than the second web page, a total of 24+24 = <<24+24=48>>48 ads.
The first three web pages had 48+36 = <<48+36=84>>84 ads
The fourth web page had 3/4 times as many ads as the second web page, a total of 3/4*24 =<<3/4*24=18>>18 ads
In all the web pages Vermont opened, he found 84+18 = <<84+18=102>>102 ads
If he clicked on 2/3 of them, he clicked on 2/3*102=<<2/3*102=68>>68 ads.
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