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Finding the Fourth Proportional to 99,408.52, 137,185.11 and 54,087.04

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Solution

The fourth proportional to 99,408.52, 137,185.11 and 54,087.04 is: 74,640.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,408.52 : 137,185.11 = 54,087.04 : x
  2. Step 2: Convert to fraction form
    99,408.52/137,185.11 = 54,087.04/x
  3. Step 3: Cross multiply
    99,408.52x = 137,185.11 × 54,087.04
  4. Step 4: Simplify right side
    99,408.52x = 7,419,936,531.97
  5. Step 5: Solve for x
    x = 7,419,936,531.97/99,408.52
  6. Step 6: Final answer
    x = 74,640.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.