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Finding the Fourth Proportional to 71,099.20, 106,735.20 and 36,020.80

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Solution

The fourth proportional to 71,099.20, 106,735.20 and 36,020.80 is: 54,074.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,099.20 : 106,735.20 = 36,020.80 : x
  2. Step 2: Convert to fraction form
    71,099.20/106,735.20 = 36,020.80/x
  3. Step 3: Cross multiply
    71,099.20x = 106,735.20 × 36,020.80
  4. Step 4: Simplify right side
    71,099.20x = 3,844,687,292.16
  5. Step 5: Solve for x
    x = 3,844,687,292.16/71,099.20
  6. Step 6: Final answer
    x = 54,074.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.