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Finding the Fourth Proportional to 169.98, 234.60 and 120.87

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Solution

The fourth proportional to 169.98, 234.60 and 120.87 is: 166.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.98 : 234.60 = 120.87 : x
  2. Step 2: Convert to fraction form
    169.98/234.60 = 120.87/x
  3. Step 3: Cross multiply
    169.98x = 234.60 × 120.87
  4. Step 4: Simplify right side
    169.98x = 28,356.10
  5. Step 5: Solve for x
    x = 28,356.10/169.98
  6. Step 6: Final answer
    x = 166.82

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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.