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Finding the Fourth Proportional to 71,561.52, 98,747.68 and 39,726.96

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Solution

The fourth proportional to 71,561.52, 98,747.68 and 39,726.96 is: 54,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,561.52 : 98,747.68 = 39,726.96 : x
  2. Step 2: Convert to fraction form
    71,561.52/98,747.68 = 39,726.96/x
  3. Step 3: Cross multiply
    71,561.52x = 98,747.68 × 39,726.96
  4. Step 4: Simplify right side
    71,561.52x = 3,922,945,133.45
  5. Step 5: Solve for x
    x = 3,922,945,133.45/71,561.52
  6. Step 6: Final answer
    x = 54,819.20

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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.