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Finding the Fourth Proportional to 71,474.82, 98,635.23 and 39,643.62

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Solution

The fourth proportional to 71,474.82, 98,635.23 and 39,643.62 is: 54,708.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,474.82 : 98,635.23 = 39,643.62 : x
  2. Step 2: Convert to fraction form
    71,474.82/98,635.23 = 39,643.62/x
  3. Step 3: Cross multiply
    71,474.82x = 98,635.23 × 39,643.62
  4. Step 4: Simplify right side
    71,474.82x = 3,910,257,576.73
  5. Step 5: Solve for x
    x = 3,910,257,576.73/71,474.82
  6. Step 6: Final answer
    x = 54,708.18

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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.