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Finding the Fourth Proportional to 163.82, 226.07 and 90.13

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Solution

The fourth proportional to 163.82, 226.07 and 90.13 is: 124.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.82 : 226.07 = 90.13 : x
  2. Step 2: Convert to fraction form
    163.82/226.07 = 90.13/x
  3. Step 3: Cross multiply
    163.82x = 226.07 × 90.13
  4. Step 4: Simplify right side
    163.82x = 20,375.69
  5. Step 5: Solve for x
    x = 20,375.69/163.82
  6. Step 6: Final answer
    x = 124.38

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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.