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Finding the Fourth Proportional to 197.17, 272.02 and 123.56

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Solution

The fourth proportional to 197.17, 272.02 and 123.56 is: 170.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.17 : 272.02 = 123.56 : x
  2. Step 2: Convert to fraction form
    197.17/272.02 = 123.56/x
  3. Step 3: Cross multiply
    197.17x = 272.02 × 123.56
  4. Step 4: Simplify right side
    197.17x = 33,610.79
  5. Step 5: Solve for x
    x = 33,610.79/197.17
  6. Step 6: Final answer
    x = 170.47

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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.