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Finding the Fourth Proportional to 163.86, 227.28 and 159.42

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Solution

The fourth proportional to 163.86, 227.28 and 159.42 is: 221.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.86 : 227.28 = 159.42 : x
  2. Step 2: Convert to fraction form
    163.86/227.28 = 159.42/x
  3. Step 3: Cross multiply
    163.86x = 227.28 × 159.42
  4. Step 4: Simplify right side
    163.86x = 36,232.98
  5. Step 5: Solve for x
    x = 36,232.98/163.86
  6. Step 6: Final answer
    x = 221.12

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.