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Finding the Fourth Proportional to 83,712.60, 125,568.90 and 54,163.80

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Solution

The fourth proportional to 83,712.60, 125,568.90 and 54,163.80 is: 81,245.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,712.60 : 125,568.90 = 54,163.80 : x
  2. Step 2: Convert to fraction form
    83,712.60/125,568.90 = 54,163.80/x
  3. Step 3: Cross multiply
    83,712.60x = 125,568.90 × 54,163.80
  4. Step 4: Simplify right side
    83,712.60x = 6,801,288,785.82
  5. Step 5: Solve for x
    x = 6,801,288,785.82/83,712.60
  6. Step 6: Final answer
    x = 81,245.70

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1.5x scale

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.