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Finding the Fourth Proportional to 71,319.20, 98,437.02 and 47,446.88

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Solution

The fourth proportional to 71,319.20, 98,437.02 and 47,446.88 is: 65,487.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,319.20 : 98,437.02 = 47,446.88 : x
  2. Step 2: Convert to fraction form
    71,319.20/98,437.02 = 47,446.88/x
  3. Step 3: Cross multiply
    71,319.20x = 98,437.02 × 47,446.88
  4. Step 4: Simplify right side
    71,319.20x = 4,670,529,475.50
  5. Step 5: Solve for x
    x = 4,670,529,475.50/71,319.20
  6. Step 6: Final answer
    x = 65,487.69

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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.