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Finding the Fourth Proportional to 169.31, 233.57 and 120.22

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Solution

The fourth proportional to 169.31, 233.57 and 120.22 is: 165.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.31 : 233.57 = 120.22 : x
  2. Step 2: Convert to fraction form
    169.31/233.57 = 120.22/x
  3. Step 3: Cross multiply
    169.31x = 233.57 × 120.22
  4. Step 4: Simplify right side
    169.31x = 28,079.50
  5. Step 5: Solve for x
    x = 28,079.50/169.31
  6. Step 6: Final answer
    x = 165.84

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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.