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Finding the Fourth Proportional to 163.13, 244.56 and 66.89

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Solution

The fourth proportional to 163.13, 244.56 and 66.89 is: 100.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.13 : 244.56 = 66.89 : x
  2. Step 2: Convert to fraction form
    163.13/244.56 = 66.89/x
  3. Step 3: Cross multiply
    163.13x = 244.56 × 66.89
  4. Step 4: Simplify right side
    163.13x = 16,358.62
  5. Step 5: Solve for x
    x = 16,358.62/163.13
  6. Step 6: Final answer
    x = 100.28

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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.