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Finding the Fourth Proportional to 91,279.57, 136,932.31 and 28,104.94

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Solution

The fourth proportional to 91,279.57, 136,932.31 and 28,104.94 is: 42,161.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,279.57 : 136,932.31 = 28,104.94 : x
  2. Step 2: Convert to fraction form
    91,279.57/136,932.31 = 28,104.94/x
  3. Step 3: Cross multiply
    91,279.57x = 136,932.31 × 28,104.94
  4. Step 4: Simplify right side
    91,279.57x = 3,848,474,286.35
  5. Step 5: Solve for x
    x = 3,848,474,286.35/91,279.57
  6. Step 6: Final answer
    x = 42,161.40

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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.