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Finding the Fourth Proportional to 146.81, 219.19 and 131.42

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Solution

The fourth proportional to 146.81, 219.19 and 131.42 is: 196.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.81 : 219.19 = 131.42 : x
  2. Step 2: Convert to fraction form
    146.81/219.19 = 131.42/x
  3. Step 3: Cross multiply
    146.81x = 219.19 × 131.42
  4. Step 4: Simplify right side
    146.81x = 28,806.42
  5. Step 5: Solve for x
    x = 28,806.42/146.81
  6. Step 6: Final answer
    x = 196.21

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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.