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Finding the Fourth Proportional to 169.96, 234.36 and 120.82

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Solution

The fourth proportional to 169.96, 234.36 and 120.82 is: 166.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.96 : 234.36 = 120.82 : x
  2. Step 2: Convert to fraction form
    169.96/234.36 = 120.82/x
  3. Step 3: Cross multiply
    169.96x = 234.36 × 120.82
  4. Step 4: Simplify right side
    169.96x = 28,315.38
  5. Step 5: Solve for x
    x = 28,315.38/169.96
  6. Step 6: Final answer
    x = 166.60

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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.