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Finding the Fourth Proportional to 138,169.92, 207,259.32 and 38,331.12

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Solution

The fourth proportional to 138,169.92, 207,259.32 and 38,331.12 is: 57,497.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,169.92 : 207,259.32 = 38,331.12 : x
  2. Step 2: Convert to fraction form
    138,169.92/207,259.32 = 38,331.12/x
  3. Step 3: Cross multiply
    138,169.92x = 207,259.32 × 38,331.12
  4. Step 4: Simplify right side
    138,169.92x = 7,944,481,866.04
  5. Step 5: Solve for x
    x = 7,944,481,866.04/138,169.92
  6. Step 6: Final answer
    x = 57,497.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.