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Finding the Fourth Proportional to 80,399.66, 120,604.49 and 27,087.20

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Solution

The fourth proportional to 80,399.66, 120,604.49 and 27,087.20 is: 40,632.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,399.66 : 120,604.49 = 27,087.20 : x
  2. Step 2: Convert to fraction form
    80,399.66/120,604.49 = 27,087.20/x
  3. Step 3: Cross multiply
    80,399.66x = 120,604.49 × 27,087.20
  4. Step 4: Simplify right side
    80,399.66x = 3,266,838,310.76
  5. Step 5: Solve for x
    x = 3,266,838,310.76/80,399.66
  6. Step 6: Final answer
    x = 40,632.49

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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.