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Finding the Fourth Proportional to 169.31, 233.49 and 122.99

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Solution

The fourth proportional to 169.31, 233.49 and 122.99 is: 169.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.31 : 233.49 = 122.99 : x
  2. Step 2: Convert to fraction form
    169.31/233.49 = 122.99/x
  3. Step 3: Cross multiply
    169.31x = 233.49 × 122.99
  4. Step 4: Simplify right side
    169.31x = 28,716.94
  5. Step 5: Solve for x
    x = 28,716.94/169.31
  6. Step 6: Final answer
    x = 169.61

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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.