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Finding the Fourth Proportional to 143.20, 213.62 and 130.96

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Solution

The fourth proportional to 143.20, 213.62 and 130.96 is: 195.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.20 : 213.62 = 130.96 : x
  2. Step 2: Convert to fraction form
    143.20/213.62 = 130.96/x
  3. Step 3: Cross multiply
    143.20x = 213.62 × 130.96
  4. Step 4: Simplify right side
    143.20x = 27,975.68
  5. Step 5: Solve for x
    x = 27,975.68/143.20
  6. Step 6: Final answer
    x = 195.36

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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.