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Finding the Fourth Proportional to 131.17, 196.89 and 122.53

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Solution

The fourth proportional to 131.17, 196.89 and 122.53 is: 183.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.17 : 196.89 = 122.53 : x
  2. Step 2: Convert to fraction form
    131.17/196.89 = 122.53/x
  3. Step 3: Cross multiply
    131.17x = 196.89 × 122.53
  4. Step 4: Simplify right side
    131.17x = 24,124.93
  5. Step 5: Solve for x
    x = 24,124.93/131.17
  6. Step 6: Final answer
    x = 183.92

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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.