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Finding the Fourth Proportional to 131.69, 197.26 and 80.17

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Solution

The fourth proportional to 131.69, 197.26 and 80.17 is: 120.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.69 : 197.26 = 80.17 : x
  2. Step 2: Convert to fraction form
    131.69/197.26 = 80.17/x
  3. Step 3: Cross multiply
    131.69x = 197.26 × 80.17
  4. Step 4: Simplify right side
    131.69x = 15,813.64
  5. Step 5: Solve for x
    x = 15,813.64/131.69
  6. Step 6: Final answer
    x = 120.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.