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Finding the Fourth Proportional to 197.56, 272.51 and 123.89

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Solution

The fourth proportional to 197.56, 272.51 and 123.89 is: 170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.56 : 272.51 = 123.89 : x
  2. Step 2: Convert to fraction form
    197.56/272.51 = 123.89/x
  3. Step 3: Cross multiply
    197.56x = 272.51 × 123.89
  4. Step 4: Simplify right side
    197.56x = 33,762.25
  5. Step 5: Solve for x
    x = 33,762.25/197.56
  6. Step 6: Final answer
    x = 170.90

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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.