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Finding the Fourth Proportional to 131.31, 196.19 and 126.77

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Solution

The fourth proportional to 131.31, 196.19 and 126.77 is: 189.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.31 : 196.19 = 126.77 : x
  2. Step 2: Convert to fraction form
    131.31/196.19 = 126.77/x
  3. Step 3: Cross multiply
    131.31x = 196.19 × 126.77
  4. Step 4: Simplify right side
    131.31x = 24,871.01
  5. Step 5: Solve for x
    x = 24,871.01/131.31
  6. Step 6: Final answer
    x = 189.41

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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.