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Finding the Fourth Proportional to 195.13, 269.24 and 120.45

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Solution

The fourth proportional to 195.13, 269.24 and 120.45 is: 166.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.13 : 269.24 = 120.45 : x
  2. Step 2: Convert to fraction form
    195.13/269.24 = 120.45/x
  3. Step 3: Cross multiply
    195.13x = 269.24 × 120.45
  4. Step 4: Simplify right side
    195.13x = 32,431.04
  5. Step 5: Solve for x
    x = 32,431.04/195.13
  6. Step 6: Final answer
    x = 166.21

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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.