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Finding the Fourth Proportional to 80,481.30, 120,840.42 and 45,012.11

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Solution

The fourth proportional to 80,481.30, 120,840.42 and 45,012.11 is: 67,584.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,481.30 : 120,840.42 = 45,012.11 : x
  2. Step 2: Convert to fraction form
    80,481.30/120,840.42 = 45,012.11/x
  3. Step 3: Cross multiply
    80,481.30x = 120,840.42 × 45,012.11
  4. Step 4: Simplify right side
    80,481.30x = 5,439,281,842.08
  5. Step 5: Solve for x
    x = 5,439,281,842.08/80,481.30
  6. Step 6: Final answer
    x = 67,584.42

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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.