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Finding the Third Proportional to 87,542 and 139,361

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Solution

The third proportional to 87,542 and 139,361 is: 221,853.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,542 : 139,361 = 139,361 : x
  2. Step 2: Convert to fraction form
    87,542/139,361 = 139,361/x
  3. Step 3: Cross multiply
    87,542x = 139,361 × 139,361
  4. Step 4: Simplify right side
    87,542x = 19,421,488,321
  5. Step 5: Solve for x
    x = 19,421,488,321/87,542
  6. Step 6: Final answer
    x = 221,853.38

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.