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Finding the Fourth Proportional to 195.63, 270.03 and 121.91

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Solution

The fourth proportional to 195.63, 270.03 and 121.91 is: 168.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.63 : 270.03 = 121.91 : x
  2. Step 2: Convert to fraction form
    195.63/270.03 = 121.91/x
  3. Step 3: Cross multiply
    195.63x = 270.03 × 121.91
  4. Step 4: Simplify right side
    195.63x = 32,919.36
  5. Step 5: Solve for x
    x = 32,919.36/195.63
  6. Step 6: Final answer
    x = 168.27

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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.