Home / 80,921.88-121,382.81-25,517.88

Finding the Fourth Proportional to 80,921.88, 121,382.81 and 25,517.88

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Solution

The fourth proportional to 80,921.88, 121,382.81 and 25,517.88 is: 38,276.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,921.88 : 121,382.81 = 25,517.88 : x
  2. Step 2: Convert to fraction form
    80,921.88/121,382.81 = 25,517.88/x
  3. Step 3: Cross multiply
    80,921.88x = 121,382.81 × 25,517.88
  4. Step 4: Simplify right side
    80,921.88x = 3,097,431,979.64
  5. Step 5: Solve for x
    x = 3,097,431,979.64/80,921.88
  6. Step 6: Final answer
    x = 38,276.82

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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.