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Finding the Fourth Proportional to 167.65, 231.18 and 154.42

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Solution

The fourth proportional to 167.65, 231.18 and 154.42 is: 212.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.65 : 231.18 = 154.42 : x
  2. Step 2: Convert to fraction form
    167.65/231.18 = 154.42/x
  3. Step 3: Cross multiply
    167.65x = 231.18 × 154.42
  4. Step 4: Simplify right side
    167.65x = 35,698.82
  5. Step 5: Solve for x
    x = 35,698.82/167.65
  6. Step 6: Final answer
    x = 212.94

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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.