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Finding the Fourth Proportional to 131.16, 179.85 and 126.58

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Solution

The fourth proportional to 131.16, 179.85 and 126.58 is: 173.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.16 : 179.85 = 126.58 : x
  2. Step 2: Convert to fraction form
    131.16/179.85 = 126.58/x
  3. Step 3: Cross multiply
    131.16x = 179.85 × 126.58
  4. Step 4: Simplify right side
    131.16x = 22,765.41
  5. Step 5: Solve for x
    x = 22,765.41/131.16
  6. Step 6: Final answer
    x = 173.57

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.