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Finding the Fourth Proportional to 72,391.68, 108,588.96 and 47,589.92

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Solution

The fourth proportional to 72,391.68, 108,588.96 and 47,589.92 is: 71,385.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,391.68 : 108,588.96 = 47,589.92 : x
  2. Step 2: Convert to fraction form
    72,391.68/108,588.96 = 47,589.92/x
  3. Step 3: Cross multiply
    72,391.68x = 108,588.96 × 47,589.92
  4. Step 4: Simplify right side
    72,391.68x = 5,167,739,919.28
  5. Step 5: Solve for x
    x = 5,167,739,919.28/72,391.68
  6. Step 6: Final answer
    x = 71,385.83

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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.