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Finding the Third Proportional to 87,260 and 138,399

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Solution

The third proportional to 87,260 and 138,399 is: 219,508.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,260 : 138,399 = 138,399 : x
  2. Step 2: Convert to fraction form
    87,260/138,399 = 138,399/x
  3. Step 3: Cross multiply
    87,260x = 138,399 × 138,399
  4. Step 4: Simplify right side
    87,260x = 19,154,283,201
  5. Step 5: Solve for x
    x = 19,154,283,201/87,260
  6. Step 6: Final answer
    x = 219,508.17

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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.