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Finding the Fourth Proportional to 167,872.52, 231,656.51 and 91,389.65

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Solution

The fourth proportional to 167,872.52, 231,656.51 and 91,389.65 is: 126,113.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,872.52 : 231,656.51 = 91,389.65 : x
  2. Step 2: Convert to fraction form
    167,872.52/231,656.51 = 91,389.65/x
  3. Step 3: Cross multiply
    167,872.52x = 231,656.51 × 91,389.65
  4. Step 4: Simplify right side
    167,872.52x = 21,171,005,753.89
  5. Step 5: Solve for x
    x = 21,171,005,753.89/167,872.52
  6. Step 6: Final answer
    x = 126,113.59

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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.