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Finding the Fourth Proportional to 80,169.88, 120,139.80 and 45,035.60

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Solution

The fourth proportional to 80,169.88, 120,139.80 and 45,035.60 is: 67,488.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,169.88 : 120,139.80 = 45,035.60 : x
  2. Step 2: Convert to fraction form
    80,169.88/120,139.80 = 45,035.60/x
  3. Step 3: Cross multiply
    80,169.88x = 120,139.80 × 45,035.60
  4. Step 4: Simplify right side
    80,169.88x = 5,410,567,976.88
  5. Step 5: Solve for x
    x = 5,410,567,976.88/80,169.88
  6. Step 6: Final answer
    x = 67,488.79

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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.