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Finding the Fourth Proportional to 71,732.75, 98,991.23 and 39,900.96

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Solution

The fourth proportional to 71,732.75, 98,991.23 and 39,900.96 is: 55,063.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,732.75 : 98,991.23 = 39,900.96 : x
  2. Step 2: Convert to fraction form
    71,732.75/98,991.23 = 39,900.96/x
  3. Step 3: Cross multiply
    71,732.75x = 98,991.23 × 39,900.96
  4. Step 4: Simplify right side
    71,732.75x = 3,949,844,909.08
  5. Step 5: Solve for x
    x = 3,949,844,909.08/71,732.75
  6. Step 6: Final answer
    x = 55,063.35

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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.