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Finding the Fourth Proportional to 80,481.40, 120,722.10 and 36,109.60

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Solution

The fourth proportional to 80,481.40, 120,722.10 and 36,109.60 is: 54,164.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,481.40 : 120,722.10 = 36,109.60 : x
  2. Step 2: Convert to fraction form
    80,481.40/120,722.10 = 36,109.60/x
  3. Step 3: Cross multiply
    80,481.40x = 120,722.10 × 36,109.60
  4. Step 4: Simplify right side
    80,481.40x = 4,359,226,742.16
  5. Step 5: Solve for x
    x = 4,359,226,742.16/80,481.40
  6. Step 6: Final answer
    x = 54,164.40

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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.