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Finding the Fourth Proportional to 168,081.76, 231,952.86 and 91,600.87

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Solution

The fourth proportional to 168,081.76, 231,952.86 and 91,600.87 is: 126,409.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,081.76 : 231,952.86 = 91,600.87 : x
  2. Step 2: Convert to fraction form
    168,081.76/231,952.86 = 91,600.87/x
  3. Step 3: Cross multiply
    168,081.76x = 231,952.86 × 91,600.87
  4. Step 4: Simplify right side
    168,081.76x = 21,247,083,774.99
  5. Step 5: Solve for x
    x = 21,247,083,774.99/168,081.76
  6. Step 6: Final answer
    x = 126,409.22

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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.