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Finding the Fourth Proportional to 196.39, 270.93 and 122.68

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Solution

The fourth proportional to 196.39, 270.93 and 122.68 is: 169.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.39 : 270.93 = 122.68 : x
  2. Step 2: Convert to fraction form
    196.39/270.93 = 122.68/x
  3. Step 3: Cross multiply
    196.39x = 270.93 × 122.68
  4. Step 4: Simplify right side
    196.39x = 33,237.69
  5. Step 5: Solve for x
    x = 33,237.69/196.39
  6. Step 6: Final answer
    x = 169.24

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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.