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Finding the Fourth Proportional to 167.15, 250.76 and 85.97

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Solution

The fourth proportional to 167.15, 250.76 and 85.97 is: 128.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.15 : 250.76 = 85.97 : x
  2. Step 2: Convert to fraction form
    167.15/250.76 = 85.97/x
  3. Step 3: Cross multiply
    167.15x = 250.76 × 85.97
  4. Step 4: Simplify right side
    167.15x = 21,558.68
  5. Step 5: Solve for x
    x = 21,558.68/167.15
  6. Step 6: Final answer
    x = 128.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.