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Finding the Third Proportional to 87,872 and 136,178

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Solution

The third proportional to 87,872 and 136,178 is: 211,039.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,872 : 136,178 = 136,178 : x
  2. Step 2: Convert to fraction form
    87,872/136,178 = 136,178/x
  3. Step 3: Cross multiply
    87,872x = 136,178 × 136,178
  4. Step 4: Simplify right side
    87,872x = 18,544,447,684
  5. Step 5: Solve for x
    x = 18,544,447,684/87,872
  6. Step 6: Final answer
    x = 211,039.33

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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.