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Finding the Fourth Proportional to 131.90, 196.70 and 126.09

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Solution

The fourth proportional to 131.90, 196.70 and 126.09 is: 188.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.90 : 196.70 = 126.09 : x
  2. Step 2: Convert to fraction form
    131.90/196.70 = 126.09/x
  3. Step 3: Cross multiply
    131.90x = 196.70 × 126.09
  4. Step 4: Simplify right side
    131.90x = 24,801.27
  5. Step 5: Solve for x
    x = 24,801.27/131.90
  6. Step 6: Final answer
    x = 188.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.