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Finding the Fourth Proportional to 167.31, 230.94 and 105.11

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Solution

The fourth proportional to 167.31, 230.94 and 105.11 is: 145.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.31 : 230.94 = 105.11 : x
  2. Step 2: Convert to fraction form
    167.31/230.94 = 105.11/x
  3. Step 3: Cross multiply
    167.31x = 230.94 × 105.11
  4. Step 4: Simplify right side
    167.31x = 24,272.95
  5. Step 5: Solve for x
    x = 24,272.95/167.31
  6. Step 6: Final answer
    x = 145.08

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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.