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Finding the Third Proportional to 87,904 and 136,218

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Solution

The third proportional to 87,904 and 136,218 is: 211,086.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,904 : 136,218 = 136,218 : x
  2. Step 2: Convert to fraction form
    87,904/136,218 = 136,218/x
  3. Step 3: Cross multiply
    87,904x = 136,218 × 136,218
  4. Step 4: Simplify right side
    87,904x = 18,555,343,524
  5. Step 5: Solve for x
    x = 18,555,343,524/87,904
  6. Step 6: Final answer
    x = 211,086.45

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.