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Finding the Fourth Proportional to 163.31, 244.89 and 71.96

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Solution

The fourth proportional to 163.31, 244.89 and 71.96 is: 107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.31 : 244.89 = 71.96 : x
  2. Step 2: Convert to fraction form
    163.31/244.89 = 71.96/x
  3. Step 3: Cross multiply
    163.31x = 244.89 × 71.96
  4. Step 4: Simplify right side
    163.31x = 17,621.06
  5. Step 5: Solve for x
    x = 17,621.06/163.31
  6. Step 6: Final answer
    x = 107.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.