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Finding the Fourth Proportional to 54,474.72, 81,691.02 and 21,190.29

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Solution

The fourth proportional to 54,474.72, 81,691.02 and 21,190.29 is: 31,777.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,474.72 : 81,691.02 = 21,190.29 : x
  2. Step 2: Convert to fraction form
    54,474.72/81,691.02 = 21,190.29/x
  3. Step 3: Cross multiply
    54,474.72x = 81,691.02 × 21,190.29
  4. Step 4: Simplify right side
    54,474.72x = 1,731,056,404.20
  5. Step 5: Solve for x
    x = 1,731,056,404.20/54,474.72
  6. Step 6: Final answer
    x = 31,777.24

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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.