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Finding the Fourth Proportional to 99,913.86, 137,876.85 and 54,591.12

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Solution

The fourth proportional to 99,913.86, 137,876.85 and 54,591.12 is: 75,333.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,913.86 : 137,876.85 = 54,591.12 : x
  2. Step 2: Convert to fraction form
    99,913.86/137,876.85 = 54,591.12/x
  3. Step 3: Cross multiply
    99,913.86x = 137,876.85 × 54,591.12
  4. Step 4: Simplify right side
    99,913.86x = 7,526,851,663.57
  5. Step 5: Solve for x
    x = 7,526,851,663.57/99,913.86
  6. Step 6: Final answer
    x = 75,333.41

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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.