Home / 138,133.27-207,589.92-81,983.87

Finding the Fourth Proportional to 138,133.27, 207,589.92 and 81,983.87

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Solution

The fourth proportional to 138,133.27, 207,589.92 and 81,983.87 is: 123,207.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,133.27 : 207,589.92 = 81,983.87 : x
  2. Step 2: Convert to fraction form
    138,133.27/207,589.92 = 81,983.87/x
  3. Step 3: Cross multiply
    138,133.27x = 207,589.92 × 81,983.87
  4. Step 4: Simplify right side
    138,133.27x = 17,019,025,014.59
  5. Step 5: Solve for x
    x = 17,019,025,014.59/138,133.27
  6. Step 6: Final answer
    x = 123,207.28

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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.