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Finding the Fourth Proportional to 71,635.20, 107,452.80 and 68,601.60

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Solution

The fourth proportional to 71,635.20, 107,452.80 and 68,601.60 is: 102,902.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,635.20 : 107,452.80 = 68,601.60 : x
  2. Step 2: Convert to fraction form
    71,635.20/107,452.80 = 68,601.60/x
  3. Step 3: Cross multiply
    71,635.20x = 107,452.80 × 68,601.60
  4. Step 4: Simplify right side
    71,635.20x = 7,371,434,004.48
  5. Step 5: Solve for x
    x = 7,371,434,004.48/71,635.20
  6. Step 6: Final answer
    x = 102,902.40

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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.