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Finding the Fourth Proportional to 167.93, 231.65 and 155.05

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Solution

The fourth proportional to 167.93, 231.65 and 155.05 is: 213.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.93 : 231.65 = 155.05 : x
  2. Step 2: Convert to fraction form
    167.93/231.65 = 155.05/x
  3. Step 3: Cross multiply
    167.93x = 231.65 × 155.05
  4. Step 4: Simplify right side
    167.93x = 35,917.14
  5. Step 5: Solve for x
    x = 35,917.14/167.93
  6. Step 6: Final answer
    x = 213.88

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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.