Finding the Third Proportional to 30.50 and 78.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30.50 : 78.25 = 78.25 : x
2. Step 2: Convert to fraction form
   30.50/78.25 = 78.25/x
3. Step 3: Cross multiply
   30.50x = 78.25 × 78.25
4. Step 4: Simplify right side
   30.50x = 6,123.06
5. Step 5: Solve for x
   x = 6,123.06/30.50
6. Step 6: Final answer
   x = 200.76