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Finding the Fourth Proportional to 168,102.59, 231,974.78 and 91,620.05

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Solution

The fourth proportional to 168,102.59, 231,974.78 and 91,620.05 is: 126,431.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,102.59 : 231,974.78 = 91,620.05 : x
  2. Step 2: Convert to fraction form
    168,102.59/231,974.78 = 91,620.05/x
  3. Step 3: Cross multiply
    168,102.59x = 231,974.78 × 91,620.05
  4. Step 4: Simplify right side
    168,102.59x = 21,253,539,324.36
  5. Step 5: Solve for x
    x = 21,253,539,324.36/168,102.59
  6. Step 6: Final answer
    x = 126,431.96

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1.5x scale

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.