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Finding the Third Proportional to 87,390 and 131,801

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Solution

The third proportional to 87,390 and 131,801 is: 198,781.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,390 : 131,801 = 131,801 : x
  2. Step 2: Convert to fraction form
    87,390/131,801 = 131,801/x
  3. Step 3: Cross multiply
    87,390x = 131,801 × 131,801
  4. Step 4: Simplify right side
    87,390x = 17,371,503,601
  5. Step 5: Solve for x
    x = 17,371,503,601/87,390
  6. Step 6: Final answer
    x = 198,781.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.