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Finding the Fourth Proportional to 71,991.75, 99,359.55 and 43,691.97

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Solution

The fourth proportional to 71,991.75, 99,359.55 and 43,691.97 is: 60,301.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,991.75 : 99,359.55 = 43,691.97 : x
  2. Step 2: Convert to fraction form
    71,991.75/99,359.55 = 43,691.97/x
  3. Step 3: Cross multiply
    71,991.75x = 99,359.55 × 43,691.97
  4. Step 4: Simplify right side
    71,991.75x = 4,341,214,477.81
  5. Step 5: Solve for x
    x = 4,341,214,477.81/71,991.75
  6. Step 6: Final answer
    x = 60,301.56

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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.