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Finding the Fourth Proportional to 54,034.88, 81,071.04 and 18,979.52

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Solution

The fourth proportional to 54,034.88, 81,071.04 and 18,979.52 is: 28,475.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,034.88 : 81,071.04 = 18,979.52 : x
  2. Step 2: Convert to fraction form
    54,034.88/81,071.04 = 18,979.52/x
  3. Step 3: Cross multiply
    54,034.88x = 81,071.04 × 18,979.52
  4. Step 4: Simplify right side
    54,034.88x = 1,538,689,425.10
  5. Step 5: Solve for x
    x = 1,538,689,425.10/54,034.88
  6. Step 6: Final answer
    x = 28,475.86

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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.