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Finding the Fourth Proportional to 71,319.60, 107,056.20 and 40,215.60

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Solution

The fourth proportional to 71,319.60, 107,056.20 and 40,215.60 is: 60,366.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,319.60 : 107,056.20 = 40,215.60 : x
  2. Step 2: Convert to fraction form
    71,319.60/107,056.20 = 40,215.60/x
  3. Step 3: Cross multiply
    71,319.60x = 107,056.20 × 40,215.60
  4. Step 4: Simplify right side
    71,319.60x = 4,305,329,316.72
  5. Step 5: Solve for x
    x = 4,305,329,316.72/71,319.60
  6. Step 6: Final answer
    x = 60,366.71

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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.