Finding the Third Proportional to 38.50 and 54.50

Step by Step Solution

1. Step 1: Write the proportion equation
   38.50 : 54.50 = 54.50 : x
2. Step 2: Convert to fraction form
   38.50/54.50 = 54.50/x
3. Step 3: Cross multiply
   38.50x = 54.50 × 54.50
4. Step 4: Simplify right side
   38.50x = 2,970.25
5. Step 5: Solve for x
   x = 2,970.25/38.50
6. Step 6: Final answer
   x = 77.15