Home / 80,921.38-121,382.07-25,517.38

Finding the Fourth Proportional to 80,921.38, 121,382.07 and 25,517.38

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Solution

The fourth proportional to 80,921.38, 121,382.07 and 25,517.38 is: 38,276.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,921.38 : 121,382.07 = 25,517.38 : x
  2. Step 2: Convert to fraction form
    80,921.38/121,382.07 = 25,517.38/x
  3. Step 3: Cross multiply
    80,921.38x = 121,382.07 × 25,517.38
  4. Step 4: Simplify right side
    80,921.38x = 3,097,352,405.38
  5. Step 5: Solve for x
    x = 3,097,352,405.38/80,921.38
  6. Step 6: Final answer
    x = 38,276.07

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1.5x scale

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.