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Finding the Fourth Proportional to 167.38, 250.66 and 128.70

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Solution

The fourth proportional to 167.38, 250.66 and 128.70 is: 192.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.38 : 250.66 = 128.70 : x
  2. Step 2: Convert to fraction form
    167.38/250.66 = 128.70/x
  3. Step 3: Cross multiply
    167.38x = 250.66 × 128.70
  4. Step 4: Simplify right side
    167.38x = 32,259.94
  5. Step 5: Solve for x
    x = 32,259.94/167.38
  6. Step 6: Final answer
    x = 192.73

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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.