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Finding the Fourth Proportional to 195.86, 270.27 and 122.20

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Solution

The fourth proportional to 195.86, 270.27 and 122.20 is: 168.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.86 : 270.27 = 122.20 : x
  2. Step 2: Convert to fraction form
    195.86/270.27 = 122.20/x
  3. Step 3: Cross multiply
    195.86x = 270.27 × 122.20
  4. Step 4: Simplify right side
    195.86x = 33,026.99
  5. Step 5: Solve for x
    x = 33,026.99/195.86
  6. Step 6: Final answer
    x = 168.63

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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.