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Finding the Fourth Proportional to 72,391.92, 108,354.60 and 56,839.92

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Solution

The fourth proportional to 72,391.92, 108,354.60 and 56,839.92 is: 85,076.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,391.92 : 108,354.60 = 56,839.92 : x
  2. Step 2: Convert to fraction form
    72,391.92/108,354.60 = 56,839.92/x
  3. Step 3: Cross multiply
    72,391.92x = 108,354.60 × 56,839.92
  4. Step 4: Simplify right side
    72,391.92x = 6,158,866,795.63
  5. Step 5: Solve for x
    x = 6,158,866,795.63/72,391.92
  6. Step 6: Final answer
    x = 85,076.72

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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.