Finding the Third Proportional to 31.25 and 67.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31.25 : 67.25 = 67.25 : x
2. Step 2: Convert to fraction form
   31.25/67.25 = 67.25/x
3. Step 3: Cross multiply
   31.25x = 67.25 × 67.25
4. Step 4: Simplify right side
   31.25x = 4,522.56
5. Step 5: Solve for x
   x = 4,522.56/31.25
6. Step 6: Final answer
   x = 144.72