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Finding the Fourth Proportional to 195.12, 292.20 and 121.81

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Solution

The fourth proportional to 195.12, 292.20 and 121.81 is: 182.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.12 : 292.20 = 121.81 : x
  2. Step 2: Convert to fraction form
    195.12/292.20 = 121.81/x
  3. Step 3: Cross multiply
    195.12x = 292.20 × 121.81
  4. Step 4: Simplify right side
    195.12x = 35,592.88
  5. Step 5: Solve for x
    x = 35,592.88/195.12
  6. Step 6: Final answer
    x = 182.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.