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Finding the Third Proportional to 81,068 and 129,508

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Solution

The third proportional to 81,068 and 129,508 is: 206,892.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,068 : 129,508 = 129,508 : x
  2. Step 2: Convert to fraction form
    81,068/129,508 = 129,508/x
  3. Step 3: Cross multiply
    81,068x = 129,508 × 129,508
  4. Step 4: Simplify right side
    81,068x = 16,772,322,064
  5. Step 5: Solve for x
    x = 16,772,322,064/81,068
  6. Step 6: Final answer
    x = 206,892.02

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.