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Finding the Fourth Proportional to 83,879.12, 125,818.68 and 75,558.80

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Solution

The fourth proportional to 83,879.12, 125,818.68 and 75,558.80 is: 113,338.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,879.12 : 125,818.68 = 75,558.80 : x
  2. Step 2: Convert to fraction form
    83,879.12/125,818.68 = 75,558.80/x
  3. Step 3: Cross multiply
    83,879.12x = 125,818.68 × 75,558.80
  4. Step 4: Simplify right side
    83,879.12x = 9,506,708,478.38
  5. Step 5: Solve for x
    x = 9,506,708,478.38/83,879.12
  6. Step 6: Final answer
    x = 113,338.20

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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.