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Finding the Fourth Proportional to 168,091.36, 231,963.21 and 91,611.36

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Solution

The fourth proportional to 168,091.36, 231,963.21 and 91,611.36 is: 126,422.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,091.36 : 231,963.21 = 91,611.36 : x
  2. Step 2: Convert to fraction form
    168,091.36/231,963.21 = 91,611.36/x
  3. Step 3: Cross multiply
    168,091.36x = 231,963.21 × 91,611.36
  4. Step 4: Simplify right side
    168,091.36x = 21,250,465,138.07
  5. Step 5: Solve for x
    x = 21,250,465,138.07/168,091.36
  6. Step 6: Final answer
    x = 126,422.12

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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.