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Finding the Fourth Proportional to 131.71, 197.56 and 123.79

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Solution

The fourth proportional to 131.71, 197.56 and 123.79 is: 185.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.71 : 197.56 = 123.79 : x
  2. Step 2: Convert to fraction form
    131.71/197.56 = 123.79/x
  3. Step 3: Cross multiply
    131.71x = 197.56 × 123.79
  4. Step 4: Simplify right side
    131.71x = 24,455.95
  5. Step 5: Solve for x
    x = 24,455.95/131.71
  6. Step 6: Final answer
    x = 185.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.