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Finding the Fourth Proportional to 167.72, 231.09 and 125.54

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Solution

The fourth proportional to 167.72, 231.09 and 125.54 is: 172.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.72 : 231.09 = 125.54 : x
  2. Step 2: Convert to fraction form
    167.72/231.09 = 125.54/x
  3. Step 3: Cross multiply
    167.72x = 231.09 × 125.54
  4. Step 4: Simplify right side
    167.72x = 29,009.26
  5. Step 5: Solve for x
    x = 29,009.26/167.72
  6. Step 6: Final answer
    x = 172.96

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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.