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Finding the Fourth Proportional to 167.30, 230.72 and 120.66

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Solution

The fourth proportional to 167.30, 230.72 and 120.66 is: 166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.30 : 230.72 = 120.66 : x
  2. Step 2: Convert to fraction form
    167.30/230.72 = 120.66/x
  3. Step 3: Cross multiply
    167.30x = 230.72 × 120.66
  4. Step 4: Simplify right side
    167.30x = 27,838.68
  5. Step 5: Solve for x
    x = 27,838.68/167.30
  6. Step 6: Final answer
    x = 166.40

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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.