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Finding the Fourth Proportional to 54,393.96, 81,591.66 and 21,115.92

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Solution

The fourth proportional to 54,393.96, 81,591.66 and 21,115.92 is: 31,674.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,393.96 : 81,591.66 = 21,115.92 : x
  2. Step 2: Convert to fraction form
    54,393.96/81,591.66 = 21,115.92/x
  3. Step 3: Cross multiply
    54,393.96x = 81,591.66 × 21,115.92
  4. Step 4: Simplify right side
    54,393.96x = 1,722,882,965.23
  5. Step 5: Solve for x
    x = 1,722,882,965.23/54,393.96
  6. Step 6: Final answer
    x = 31,674.16

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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.