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Finding the Fourth Proportional to 71,760.62, 99,033.53 and 39,930.20

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Solution

The fourth proportional to 71,760.62, 99,033.53 and 39,930.20 is: 55,105.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,760.62 : 99,033.53 = 39,930.20 : x
  2. Step 2: Convert to fraction form
    71,760.62/99,033.53 = 39,930.20/x
  3. Step 3: Cross multiply
    71,760.62x = 99,033.53 × 39,930.20
  4. Step 4: Simplify right side
    71,760.62x = 3,954,427,964.79
  5. Step 5: Solve for x
    x = 3,954,427,964.79/71,760.62
  6. Step 6: Final answer
    x = 55,105.83

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1.5x scale

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.