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Finding the Third Proportional to 87,698 and 136,680

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Solution

The third proportional to 87,698 and 136,680 is: 213,019.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,698 : 136,680 = 136,680 : x
  2. Step 2: Convert to fraction form
    87,698/136,680 = 136,680/x
  3. Step 3: Cross multiply
    87,698x = 136,680 × 136,680
  4. Step 4: Simplify right side
    87,698x = 18,681,422,400
  5. Step 5: Solve for x
    x = 18,681,422,400/87,698
  6. Step 6: Final answer
    x = 213,019.94

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.