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Finding the Third Proportional to 83,417 and 129,272

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Solution

The third proportional to 83,417 and 129,272 is: 200,333.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,417 : 129,272 = 129,272 : x
  2. Step 2: Convert to fraction form
    83,417/129,272 = 129,272/x
  3. Step 3: Cross multiply
    83,417x = 129,272 × 129,272
  4. Step 4: Simplify right side
    83,417x = 16,711,249,984
  5. Step 5: Solve for x
    x = 16,711,249,984/83,417
  6. Step 6: Final answer
    x = 200,333.86

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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.