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Finding the Fourth Proportional to 80,492.88, 120,626.64 and 68,584.56

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Solution

The fourth proportional to 80,492.88, 120,626.64 and 68,584.56 is: 102,780.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,492.88 : 120,626.64 = 68,584.56 : x
  2. Step 2: Convert to fraction form
    80,492.88/120,626.64 = 68,584.56/x
  3. Step 3: Cross multiply
    80,492.88x = 120,626.64 × 68,584.56
  4. Step 4: Simplify right side
    80,492.88x = 8,273,125,028.68
  5. Step 5: Solve for x
    x = 8,273,125,028.68/80,492.88
  6. Step 6: Final answer
    x = 102,780.83

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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.