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Finding the Fourth Proportional to 80,340.39, 120,426.98 and 26,992.80

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Solution

The fourth proportional to 80,340.39, 120,426.98 and 26,992.80 is: 40,461.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,340.39 : 120,426.98 = 26,992.80 : x
  2. Step 2: Convert to fraction form
    80,340.39/120,426.98 = 26,992.80/x
  3. Step 3: Cross multiply
    80,340.39x = 120,426.98 × 26,992.80
  4. Step 4: Simplify right side
    80,340.39x = 3,250,661,250.78
  5. Step 5: Solve for x
    x = 3,250,661,250.78/80,340.39
  6. Step 6: Final answer
    x = 40,461.11

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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.