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Finding the Third Proportional to 72,639 and 156,745

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Solution

The third proportional to 72,639 and 156,745 is: 338,234.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,639 : 156,745 = 156,745 : x
  2. Step 2: Convert to fraction form
    72,639/156,745 = 156,745/x
  3. Step 3: Cross multiply
    72,639x = 156,745 × 156,745
  4. Step 4: Simplify right side
    72,639x = 24,568,995,025
  5. Step 5: Solve for x
    x = 24,568,995,025/72,639
  6. Step 6: Final answer
    x = 338,234.21

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.