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Finding the Fourth Proportional to 80,572.80, 120,801.60 and 36,163.20

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Solution

The fourth proportional to 80,572.80, 120,801.60 and 36,163.20 is: 54,218.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,572.80 : 120,801.60 = 36,163.20 : x
  2. Step 2: Convert to fraction form
    80,572.80/120,801.60 = 36,163.20/x
  3. Step 3: Cross multiply
    80,572.80x = 120,801.60 × 36,163.20
  4. Step 4: Simplify right side
    80,572.80x = 4,368,572,421.12
  5. Step 5: Solve for x
    x = 4,368,572,421.12/80,572.80
  6. Step 6: Final answer
    x = 54,218.95

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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.