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Finding the Fourth Proportional to 80,394.76, 120,553.80 and 36,021.88

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Solution

The fourth proportional to 80,394.76, 120,553.80 and 36,021.88 is: 54,015.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,394.76 : 120,553.80 = 36,021.88 : x
  2. Step 2: Convert to fraction form
    80,394.76/120,553.80 = 36,021.88/x
  3. Step 3: Cross multiply
    80,394.76x = 120,553.80 × 36,021.88
  4. Step 4: Simplify right side
    80,394.76x = 4,342,574,517.14
  5. Step 5: Solve for x
    x = 4,342,574,517.14/80,394.76
  6. Step 6: Final answer
    x = 54,015.64

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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.