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Finding the Fourth Proportional to 78,613.76, 108,462.08 and 45,073.92

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Solution

The fourth proportional to 78,613.76, 108,462.08 and 45,073.92 is: 62,187.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,613.76 : 108,462.08 = 45,073.92 : x
  2. Step 2: Convert to fraction form
    78,613.76/108,462.08 = 45,073.92/x
  3. Step 3: Cross multiply
    78,613.76x = 108,462.08 × 45,073.92
  4. Step 4: Simplify right side
    78,613.76x = 4,888,811,116.95
  5. Step 5: Solve for x
    x = 4,888,811,116.95/78,613.76
  6. Step 6: Final answer
    x = 62,187.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.