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Finding the Fourth Proportional to 167,431.50, 231,055.56 and 91,984.86

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Solution

The fourth proportional to 167,431.50, 231,055.56 and 91,984.86 is: 126,939.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,431.50 : 231,055.56 = 91,984.86 : x
  2. Step 2: Convert to fraction form
    167,431.50/231,055.56 = 91,984.86/x
  3. Step 3: Cross multiply
    167,431.50x = 231,055.56 × 91,984.86
  4. Step 4: Simplify right side
    167,431.50x = 21,253,613,338.82
  5. Step 5: Solve for x
    x = 21,253,613,338.82/167,431.50
  6. Step 6: Final answer
    x = 126,939.16

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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.