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Finding the Fourth Proportional to 71,520.56, 98,472.47 and 62,991.26

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Solution

The fourth proportional to 71,520.56, 98,472.47 and 62,991.26 is: 86,728.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,520.56 : 98,472.47 = 62,991.26 : x
  2. Step 2: Convert to fraction form
    71,520.56/98,472.47 = 62,991.26/x
  3. Step 3: Cross multiply
    71,520.56x = 98,472.47 × 62,991.26
  4. Step 4: Simplify right side
    71,520.56x = 6,202,904,153.29
  5. Step 5: Solve for x
    x = 6,202,904,153.29/71,520.56
  6. Step 6: Final answer
    x = 86,728.97

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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.