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Finding the Fourth Proportional to 71,613.75, 107,422.76 and 34,177.78

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Solution

The fourth proportional to 71,613.75, 107,422.76 and 34,177.78 is: 51,267.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,613.75 : 107,422.76 = 34,177.78 : x
  2. Step 2: Convert to fraction form
    71,613.75/107,422.76 = 34,177.78/x
  3. Step 3: Cross multiply
    71,613.75x = 107,422.76 × 34,177.78
  4. Step 4: Simplify right side
    71,613.75x = 3,671,471,458.27
  5. Step 5: Solve for x
    x = 3,671,471,458.27/71,613.75
  6. Step 6: Final answer
    x = 51,267.69

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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.