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Finding the Fourth Proportional to 121,843.20, 182,764.80 and 92,318.70

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Solution

The fourth proportional to 121,843.20, 182,764.80 and 92,318.70 is: 138,478.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,843.20 : 182,764.80 = 92,318.70 : x
  2. Step 2: Convert to fraction form
    121,843.20/182,764.80 = 92,318.70/x
  3. Step 3: Cross multiply
    121,843.20x = 182,764.80 × 92,318.70
  4. Step 4: Simplify right side
    121,843.20x = 16,872,608,741.76
  5. Step 5: Solve for x
    x = 16,872,608,741.76/121,843.20
  6. Step 6: Final answer
    x = 138,478.05

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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.