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Finding the Fourth Proportional to 167.15, 230.56 and 120.45

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Solution

The fourth proportional to 167.15, 230.56 and 120.45 is: 166.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.15 : 230.56 = 120.45 : x
  2. Step 2: Convert to fraction form
    167.15/230.56 = 120.45/x
  3. Step 3: Cross multiply
    167.15x = 230.56 × 120.45
  4. Step 4: Simplify right side
    167.15x = 27,770.95
  5. Step 5: Solve for x
    x = 27,770.95/167.15
  6. Step 6: Final answer
    x = 166.14

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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.