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Finding the Fourth Proportional to 163.89, 226.23 and 105.69

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Solution

The fourth proportional to 163.89, 226.23 and 105.69 is: 145.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.89 : 226.23 = 105.69 : x
  2. Step 2: Convert to fraction form
    163.89/226.23 = 105.69/x
  3. Step 3: Cross multiply
    163.89x = 226.23 × 105.69
  4. Step 4: Simplify right side
    163.89x = 23,909.72
  5. Step 5: Solve for x
    x = 23,909.72/163.89
  6. Step 6: Final answer
    x = 145.89

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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.