Answer:
Virginia
Step-by-step explanation:
Before the compromise was created, the government only count white citizens as a part of state's population. The slaves were not considered as one.
After the 3/5 compromise was created in 1787, the slaves were counted as part of the population. But 1 slave only counted as 3/5 population.
At that time, Virginia had one of the most of states in the country since it possesses large number of agricultural plantations.. After the compromise it legally became a state with the largest population.