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Finding the Third Proportional to 87,439.50 and 128,260.13

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Solution

The third proportional to 87,439.50 and 128,260.13 is: 188,137.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,439.50 : 128,260.13 = 128,260.13 : x
  2. Step 2: Convert to fraction form
    87,439.50/128,260.13 = 128,260.13/x
  3. Step 3: Cross multiply
    87,439.50x = 128,260.13 × 128,260.13
  4. Step 4: Simplify right side
    87,439.50x = 16,450,659,665.02
  5. Step 5: Solve for x
    x = 16,450,659,665.02/87,439.50
  6. Step 6: Final answer
    x = 188,137.62

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.