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Finding the Fourth Proportional to 91,279.52, 136,934.84 and 40,696.90

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Solution

The fourth proportional to 91,279.52, 136,934.84 and 40,696.90 is: 61,052.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,279.52 : 136,934.84 = 40,696.90 : x
  2. Step 2: Convert to fraction form
    91,279.52/136,934.84 = 40,696.90/x
  3. Step 3: Cross multiply
    91,279.52x = 136,934.84 × 40,696.90
  4. Step 4: Simplify right side
    91,279.52x = 5,572,822,805.32
  5. Step 5: Solve for x
    x = 5,572,822,805.32/91,279.52
  6. Step 6: Final answer
    x = 61,052.28

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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.