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Finding the Fourth Proportional to 71,321.60, 107,059.20 and 40,217.60

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Solution

The fourth proportional to 71,321.60, 107,059.20 and 40,217.60 is: 60,369.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,321.60 : 107,059.20 = 40,217.60 : x
  2. Step 2: Convert to fraction form
    71,321.60/107,059.20 = 40,217.60/x
  3. Step 3: Cross multiply
    71,321.60x = 107,059.20 × 40,217.60
  4. Step 4: Simplify right side
    71,321.60x = 4,305,664,081.92
  5. Step 5: Solve for x
    x = 4,305,664,081.92/71,321.60
  6. Step 6: Final answer
    x = 60,369.71

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1.5x scale

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.