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Finding the Fourth Proportional to 54,079.44, 81,123.96 and 19,019.40

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Solution

The fourth proportional to 54,079.44, 81,123.96 and 19,019.40 is: 28,530.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,079.44 : 81,123.96 = 19,019.40 : x
  2. Step 2: Convert to fraction form
    54,079.44/81,123.96 = 19,019.40/x
  3. Step 3: Cross multiply
    54,079.44x = 81,123.96 × 19,019.40
  4. Step 4: Simplify right side
    54,079.44x = 1,542,929,044.82
  5. Step 5: Solve for x
    x = 1,542,929,044.82/54,079.44
  6. Step 6: Final answer
    x = 28,530.79

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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.