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Finding the Fourth Proportional to 167,912.78, 231,719.27 and 91,430.69

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Solution

The fourth proportional to 167,912.78, 231,719.27 and 91,430.69 is: 126,174.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,912.78 : 231,719.27 = 91,430.69 : x
  2. Step 2: Convert to fraction form
    167,912.78/231,719.27 = 91,430.69/x
  3. Step 3: Cross multiply
    167,912.78x = 231,719.27 × 91,430.69
  4. Step 4: Simplify right side
    167,912.78x = 21,186,251,126.65
  5. Step 5: Solve for x
    x = 21,186,251,126.65/167,912.78
  6. Step 6: Final answer
    x = 126,174.15

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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.