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Finding the Third Proportional to 87,488 and 138,912

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Solution

The third proportional to 87,488 and 138,912 is: 220,562.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,488 : 138,912 = 138,912 : x
  2. Step 2: Convert to fraction form
    87,488/138,912 = 138,912/x
  3. Step 3: Cross multiply
    87,488x = 138,912 × 138,912
  4. Step 4: Simplify right side
    87,488x = 19,296,543,744
  5. Step 5: Solve for x
    x = 19,296,543,744/87,488
  6. Step 6: Final answer
    x = 220,562.18

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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.