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Finding the Third Proportional to 87,639.50 and 191,864

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Solution

The third proportional to 87,639.50 and 191,864 is: 420,036.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,639.50 : 191,864 = 191,864 : x
  2. Step 2: Convert to fraction form
    87,639.50/191,864 = 191,864/x
  3. Step 3: Cross multiply
    87,639.50x = 191,864 × 191,864
  4. Step 4: Simplify right side
    87,639.50x = 36,811,794,496
  5. Step 5: Solve for x
    x = 36,811,794,496/87,639.50
  6. Step 6: Final answer
    x = 420,036.56

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.