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Finding the Fourth Proportional to 195.80, 270.12 and 122.08

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Solution

The fourth proportional to 195.80, 270.12 and 122.08 is: 168.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.80 : 270.12 = 122.08 : x
  2. Step 2: Convert to fraction form
    195.80/270.12 = 122.08/x
  3. Step 3: Cross multiply
    195.80x = 270.12 × 122.08
  4. Step 4: Simplify right side
    195.80x = 32,976.25
  5. Step 5: Solve for x
    x = 32,976.25/195.80
  6. Step 6: Final answer
    x = 168.42

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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.