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Finding the Fourth Proportional to 131.96, 199.12 and 126.96

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Solution

The fourth proportional to 131.96, 199.12 and 126.96 is: 191.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.96 : 199.12 = 126.96 : x
  2. Step 2: Convert to fraction form
    131.96/199.12 = 126.96/x
  3. Step 3: Cross multiply
    131.96x = 199.12 × 126.96
  4. Step 4: Simplify right side
    131.96x = 25,280.28
  5. Step 5: Solve for x
    x = 25,280.28/131.96
  6. Step 6: Final answer
    x = 191.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.