Question 118703
let L= area of lake superior, N=area of lake ontario [don't use O(oh) since it looks like 0(zero)]

write an equation: L=4N 
substitute L=78,114
78114 = 4N
solve by dividing both sides of the equation by 4
{{78114/4}={4N/4}}
19528.5 = N
The area of lake Ontario is 19,528.5 km squared.