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Finding the Fourth Proportional to 80,392.60, 120,600.78 and 27,787.96

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Solution

The fourth proportional to 80,392.60, 120,600.78 and 27,787.96 is: 41,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,392.60 : 120,600.78 = 27,787.96 : x
  2. Step 2: Convert to fraction form
    80,392.60/120,600.78 = 27,787.96/x
  3. Step 3: Cross multiply
    80,392.60x = 120,600.78 × 27,787.96
  4. Step 4: Simplify right side
    80,392.60x = 3,351,249,650.61
  5. Step 5: Solve for x
    x = 3,351,249,650.61/80,392.60
  6. Step 6: Final answer
    x = 41,686.05

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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.