Home / 83,689.20-115,531.92-65,726.64

Finding the Fourth Proportional to 83,689.20, 115,531.92 and 65,726.64

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Solution

The fourth proportional to 83,689.20, 115,531.92 and 65,726.64 is: 90,734.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,689.20 : 115,531.92 = 65,726.64 : x
  2. Step 2: Convert to fraction form
    83,689.20/115,531.92 = 65,726.64/x
  3. Step 3: Cross multiply
    83,689.20x = 115,531.92 × 65,726.64
  4. Step 4: Simplify right side
    83,689.20x = 7,593,524,914.35
  5. Step 5: Solve for x
    x = 7,593,524,914.35/83,689.20
  6. Step 6: Final answer
    x = 90,734.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.