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Finding the Fourth Proportional to 78,811.92, 108,758.76 and 43,002.96

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Solution

The fourth proportional to 78,811.92, 108,758.76 and 43,002.96 is: 59,343.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,811.92 : 108,758.76 = 43,002.96 : x
  2. Step 2: Convert to fraction form
    78,811.92/108,758.76 = 43,002.96/x
  3. Step 3: Cross multiply
    78,811.92x = 108,758.76 × 43,002.96
  4. Step 4: Simplify right side
    78,811.92x = 4,676,948,605.93
  5. Step 5: Solve for x
    x = 4,676,948,605.93/78,811.92
  6. Step 6: Final answer
    x = 59,343.16

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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.