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Finding the Fourth Proportional to 80,428.80, 120,672.48 and 27,843.60

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Solution

The fourth proportional to 80,428.80, 120,672.48 and 27,843.60 is: 41,775.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,428.80 : 120,672.48 = 27,843.60 : x
  2. Step 2: Convert to fraction form
    80,428.80/120,672.48 = 27,843.60/x
  3. Step 3: Cross multiply
    80,428.80x = 120,672.48 × 27,843.60
  4. Step 4: Simplify right side
    80,428.80x = 3,359,956,264.13
  5. Step 5: Solve for x
    x = 3,359,956,264.13/80,428.80
  6. Step 6: Final answer
    x = 41,775.54

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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.