Home / 138,436.29-207,508.64-71,805.69

Finding the Fourth Proportional to 138,436.29, 207,508.64 and 71,805.69

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Solution

The fourth proportional to 138,436.29, 207,508.64 and 71,805.69 is: 107,632.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,436.29 : 207,508.64 = 71,805.69 : x
  2. Step 2: Convert to fraction form
    138,436.29/207,508.64 = 71,805.69/x
  3. Step 3: Cross multiply
    138,436.29x = 207,508.64 × 71,805.69
  4. Step 4: Simplify right side
    138,436.29x = 14,900,300,717.13
  5. Step 5: Solve for x
    x = 14,900,300,717.13/138,436.29
  6. Step 6: Final answer
    x = 107,632.91

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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.