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Finding the Third Proportional to 83,419 and 129,275

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Solution

The third proportional to 83,419 and 129,275 is: 200,338.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,419 : 129,275 = 129,275 : x
  2. Step 2: Convert to fraction form
    83,419/129,275 = 129,275/x
  3. Step 3: Cross multiply
    83,419x = 129,275 × 129,275
  4. Step 4: Simplify right side
    83,419x = 16,712,025,625
  5. Step 5: Solve for x
    x = 16,712,025,625/83,419
  6. Step 6: Final answer
    x = 200,338.36

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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.