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Finding the Fourth Proportional to 81,331.40, 121,997.10 and 25,927.40

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Solution

The fourth proportional to 81,331.40, 121,997.10 and 25,927.40 is: 38,891.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,331.40 : 121,997.10 = 25,927.40 : x
  2. Step 2: Convert to fraction form
    81,331.40/121,997.10 = 25,927.40/x
  3. Step 3: Cross multiply
    81,331.40x = 121,997.10 × 25,927.40
  4. Step 4: Simplify right side
    81,331.40x = 3,163,067,610.54
  5. Step 5: Solve for x
    x = 3,163,067,610.54/81,331.40
  6. Step 6: Final answer
    x = 38,891.10

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Similar ratio
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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.