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Finding the Fourth Proportional to 169.22, 233.15 and 122.51

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Solution

The fourth proportional to 169.22, 233.15 and 122.51 is: 168.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.22 : 233.15 = 122.51 : x
  2. Step 2: Convert to fraction form
    169.22/233.15 = 122.51/x
  3. Step 3: Cross multiply
    169.22x = 233.15 × 122.51
  4. Step 4: Simplify right side
    169.22x = 28,563.18
  5. Step 5: Solve for x
    x = 28,563.18/169.22
  6. Step 6: Final answer
    x = 168.79

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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.