Home / 138,132.27-207,588.42-81,982.87

Finding the Fourth Proportional to 138,132.27, 207,588.42 and 81,982.87

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Solution

The fourth proportional to 138,132.27, 207,588.42 and 81,982.87 is: 123,205.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,132.27 : 207,588.42 = 81,982.87 : x
  2. Step 2: Convert to fraction form
    138,132.27/207,588.42 = 81,982.87/x
  3. Step 3: Cross multiply
    138,132.27x = 207,588.42 × 81,982.87
  4. Step 4: Simplify right side
    138,132.27x = 17,018,693,931.39
  5. Step 5: Solve for x
    x = 17,018,693,931.39/138,132.27
  6. Step 6: Final answer
    x = 123,205.78

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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.