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Finding the Fourth Proportional to 83,689.77, 125,488.45 and 43,608.69

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Solution

The fourth proportional to 83,689.77, 125,488.45 and 43,608.69 is: 65,388.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,689.77 : 125,488.45 = 43,608.69 : x
  2. Step 2: Convert to fraction form
    83,689.77/125,488.45 = 43,608.69/x
  3. Step 3: Cross multiply
    83,689.77x = 125,488.45 × 43,608.69
  4. Step 4: Simplify right side
    83,689.77x = 5,472,386,069.14
  5. Step 5: Solve for x
    x = 5,472,386,069.14/83,689.77
  6. Step 6: Final answer
    x = 65,388.95

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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.