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Finding the Fourth Proportional to 121.73, 168.09 and 94.37

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Solution

The fourth proportional to 121.73, 168.09 and 94.37 is: 130.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.73 : 168.09 = 94.37 : x
  2. Step 2: Convert to fraction form
    121.73/168.09 = 94.37/x
  3. Step 3: Cross multiply
    121.73x = 168.09 × 94.37
  4. Step 4: Simplify right side
    121.73x = 15,862.65
  5. Step 5: Solve for x
    x = 15,862.65/121.73
  6. Step 6: Final answer
    x = 130.31

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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.