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Finding the Fourth Proportional to 80,481.16, 120,840.25 and 45,011.96

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Solution

The fourth proportional to 80,481.16, 120,840.25 and 45,011.96 is: 67,584.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,481.16 : 120,840.25 = 45,011.96 : x
  2. Step 2: Convert to fraction form
    80,481.16/120,840.25 = 45,011.96/x
  3. Step 3: Cross multiply
    80,481.16x = 120,840.25 × 45,011.96
  4. Step 4: Simplify right side
    80,481.16x = 5,439,256,499.39
  5. Step 5: Solve for x
    x = 5,439,256,499.39/80,481.16
  6. Step 6: Final answer
    x = 67,584.22

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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.