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Finding the Fourth Proportional to 80,394.60, 120,603.78 and 27,789.96

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Solution

The fourth proportional to 80,394.60, 120,603.78 and 27,789.96 is: 41,689.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,394.60 : 120,603.78 = 27,789.96 : x
  2. Step 2: Convert to fraction form
    80,394.60/120,603.78 = 27,789.96/x
  3. Step 3: Cross multiply
    80,394.60x = 120,603.78 × 27,789.96
  4. Step 4: Simplify right side
    80,394.60x = 3,351,574,222.05
  5. Step 5: Solve for x
    x = 3,351,574,222.05/80,394.60
  6. Step 6: Final answer
    x = 41,689.05

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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.