There are 128 ounces in 1 gallon. 128 divided by 3 is 42.6 (the six repeats). so therefore you are adding 42.6 ounces of cleaning solution to 85.3 ounces of water
I would say that it’s just 1.5 times more of the drink because the recipe calls for a 2:3 ratio but she used a 3:4 and that’s an increase of 1.5 each side, but I’m not entirely sure