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Finding the Fourth Proportional to 167.18, 250.80 and 80.51

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Solution

The fourth proportional to 167.18, 250.80 and 80.51 is: 120.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.18 : 250.80 = 80.51 : x
  2. Step 2: Convert to fraction form
    167.18/250.80 = 80.51/x
  3. Step 3: Cross multiply
    167.18x = 250.80 × 80.51
  4. Step 4: Simplify right side
    167.18x = 20,190.65
  5. Step 5: Solve for x
    x = 20,190.65/167.18
  6. Step 6: Final answer
    x = 120.78

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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.