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Finding the Third Proportional to 129,871 and 207,472

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Solution

The third proportional to 129,871 and 207,472 is: 331,441.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,871 : 207,472 = 207,472 : x
  2. Step 2: Convert to fraction form
    129,871/207,472 = 207,472/x
  3. Step 3: Cross multiply
    129,871x = 207,472 × 207,472
  4. Step 4: Simplify right side
    129,871x = 43,044,630,784
  5. Step 5: Solve for x
    x = 43,044,630,784/129,871
  6. Step 6: Final answer
    x = 331,441.44

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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.