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Finding the Fourth Proportional to 131,097.98, 180,930.60 and 74,517.86

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Solution

The fourth proportional to 131,097.98, 180,930.60 and 74,517.86 is: 102,843.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,097.98 : 180,930.60 = 74,517.86 : x
  2. Step 2: Convert to fraction form
    131,097.98/180,930.60 = 74,517.86/x
  3. Step 3: Cross multiply
    131,097.98x = 180,930.60 × 74,517.86
  4. Step 4: Simplify right side
    131,097.98x = 13,482,561,120.52
  5. Step 5: Solve for x
    x = 13,482,561,120.52/131,097.98
  6. Step 6: Final answer
    x = 102,843.39

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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.