Home / 54,165.18-81,192.42-20,872.20

Finding the Fourth Proportional to 54,165.18, 81,192.42 and 20,872.20

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Solution

The fourth proportional to 54,165.18, 81,192.42 and 20,872.20 is: 31,286.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,165.18 : 81,192.42 = 20,872.20 : x
  2. Step 2: Convert to fraction form
    54,165.18/81,192.42 = 20,872.20/x
  3. Step 3: Cross multiply
    54,165.18x = 81,192.42 × 20,872.20
  4. Step 4: Simplify right side
    54,165.18x = 1,694,664,428.72
  5. Step 5: Solve for x
    x = 1,694,664,428.72/54,165.18
  6. Step 6: Final answer
    x = 31,286.97

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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.