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Finding the Fourth Proportional to 54,408.92, 81,640.71 and 19,351.31

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Solution

The fourth proportional to 54,408.92, 81,640.71 and 19,351.31 is: 29,036.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,408.92 : 81,640.71 = 19,351.31 : x
  2. Step 2: Convert to fraction form
    54,408.92/81,640.71 = 19,351.31/x
  3. Step 3: Cross multiply
    54,408.92x = 81,640.71 × 19,351.31
  4. Step 4: Simplify right side
    54,408.92x = 1,579,854,279.63
  5. Step 5: Solve for x
    x = 1,579,854,279.63/54,408.92
  6. Step 6: Final answer
    x = 29,036.68

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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.