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Finding the Fourth Proportional to 45,761.70, 68,631.33 and 12,481.92

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Solution

The fourth proportional to 45,761.70, 68,631.33 and 12,481.92 is: 18,719.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,761.70 : 68,631.33 = 12,481.92 : x
  2. Step 2: Convert to fraction form
    45,761.70/68,631.33 = 12,481.92/x
  3. Step 3: Cross multiply
    45,761.70x = 68,631.33 × 12,481.92
  4. Step 4: Simplify right side
    45,761.70x = 856,650,770.55
  5. Step 5: Solve for x
    x = 856,650,770.55/45,761.70
  6. Step 6: Final answer
    x = 18,719.82

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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.