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Finding the Fourth Proportional to 80,884.80, 121,456.80 and 54,705.60

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Solution

The fourth proportional to 80,884.80, 121,456.80 and 54,705.60 is: 82,146.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,884.80 : 121,456.80 = 54,705.60 : x
  2. Step 2: Convert to fraction form
    80,884.80/121,456.80 = 54,705.60/x
  3. Step 3: Cross multiply
    80,884.80x = 121,456.80 × 54,705.60
  4. Step 4: Simplify right side
    80,884.80x = 6,644,367,118.08
  5. Step 5: Solve for x
    x = 6,644,367,118.08/80,884.80
  6. Step 6: Final answer
    x = 82,146.05

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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.