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Finding the Fourth Proportional to 54,608.78, 81,912.36 and 17,672.78

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Solution

The fourth proportional to 54,608.78, 81,912.36 and 17,672.78 is: 26,508.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,608.78 : 81,912.36 = 17,672.78 : x
  2. Step 2: Convert to fraction form
    54,608.78/81,912.36 = 17,672.78/x
  3. Step 3: Cross multiply
    54,608.78x = 81,912.36 × 17,672.78
  4. Step 4: Simplify right side
    54,608.78x = 1,447,619,117.56
  5. Step 5: Solve for x
    x = 1,447,619,117.56/54,608.78
  6. Step 6: Final answer
    x = 26,508.91

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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.