Apunch recipe says to mix 4 cups pineapple juice, 8 cups orange juice, and 12 cups seltzer in order to make 18 servings of punch. how many cups of each ingredients do you need to make 108 cups of punch

24 cups pineapple, 48 cups orange juice, 72 cups seltzer

Step-by-step explanation:

Multiply each ratio by 6, because the ratios that are shown make 18 cups of punch. 18 x 6 = 108 cups of punch. This is why each ratio of ingredients is multiplied by 6 to have the same concentration of each ingredient. The ratios stay the same, just the amount of punch increases.