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Finding the Fourth Proportional to 135,791.10, 203,607.72 and 90,863.79

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Solution

The fourth proportional to 135,791.10, 203,607.72 and 90,863.79 is: 136,242.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,791.10 : 203,607.72 = 90,863.79 : x
  2. Step 2: Convert to fraction form
    135,791.10/203,607.72 = 90,863.79/x
  3. Step 3: Cross multiply
    135,791.10x = 203,607.72 × 90,863.79
  4. Step 4: Simplify right side
    135,791.10x = 18,500,569,112.46
  5. Step 5: Solve for x
    x = 18,500,569,112.46/135,791.10
  6. Step 6: Final answer
    x = 136,242.87

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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.