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Finding the Fourth Proportional to 83,859.15, 125,809.28 and 68,891.57

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Solution

The fourth proportional to 83,859.15, 125,809.28 and 68,891.57 is: 103,354.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,859.15 : 125,809.28 = 68,891.57 : x
  2. Step 2: Convert to fraction form
    83,859.15/125,809.28 = 68,891.57/x
  3. Step 3: Cross multiply
    83,859.15x = 125,809.28 × 68,891.57
  4. Step 4: Simplify right side
    83,859.15x = 8,667,198,819.77
  5. Step 5: Solve for x
    x = 8,667,198,819.77/83,859.15
  6. Step 6: Final answer
    x = 103,354.24

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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.