Answer:
111 miles
Explanation:
Youngstown, Prairieville; and Dorchester, in respective order, lie approximately in a straight line.
Total distance from Youngstown to Dorchester = 213 miles.
Youngstown to Prairieville = 102 miles
Find Prairieville to Dorchester.
Distance from Prairieville to Dorchester = Total distance - distance from Youngstown to Prairieville
= 213 miles - 102 miles
= 111 miles
Therefore, distance from Prairieville to Dorchester = 111 miles