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Finding the Third Proportional to 83,553 and 129,439

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Solution

The third proportional to 83,553 and 129,439 is: 200,524.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,553 : 129,439 = 129,439 : x
  2. Step 2: Convert to fraction form
    83,553/129,439 = 129,439/x
  3. Step 3: Cross multiply
    83,553x = 129,439 × 129,439
  4. Step 4: Simplify right side
    83,553x = 16,754,454,721
  5. Step 5: Solve for x
    x = 16,754,454,721/83,553
  6. Step 6: Final answer
    x = 200,524.87

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.