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Finding the Fourth Proportional to 131.27, 197.59 and 118.70

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Solution

The fourth proportional to 131.27, 197.59 and 118.70 is: 178.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.27 : 197.59 = 118.70 : x
  2. Step 2: Convert to fraction form
    131.27/197.59 = 118.70/x
  3. Step 3: Cross multiply
    131.27x = 197.59 × 118.70
  4. Step 4: Simplify right side
    131.27x = 23,452.85
  5. Step 5: Solve for x
    x = 23,452.85/131.27
  6. Step 6: Final answer
    x = 178.67

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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.