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Finding the Fourth Proportional to 163.72, 226.38 and 143.22

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Solution

The fourth proportional to 163.72, 226.38 and 143.22 is: 198.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.72 : 226.38 = 143.22 : x
  2. Step 2: Convert to fraction form
    163.72/226.38 = 143.22/x
  3. Step 3: Cross multiply
    163.72x = 226.38 × 143.22
  4. Step 4: Simplify right side
    163.72x = 32,422.14
  5. Step 5: Solve for x
    x = 32,422.14/163.72
  6. Step 6: Final answer
    x = 198.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.