Home / 80,769.68-121,174.20-28,179.60

Finding the Fourth Proportional to 80,769.68, 121,174.20 and 28,179.60

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Solution

The fourth proportional to 80,769.68, 121,174.20 and 28,179.60 is: 42,276.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,769.68 : 121,174.20 = 28,179.60 : x
  2. Step 2: Convert to fraction form
    80,769.68/121,174.20 = 28,179.60/x
  3. Step 3: Cross multiply
    80,769.68x = 121,174.20 × 28,179.60
  4. Step 4: Simplify right side
    80,769.68x = 3,414,640,486.32
  5. Step 5: Solve for x
    x = 3,414,640,486.32/80,769.68
  6. Step 6: Final answer
    x = 42,276.27

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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.