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Finding the Fourth Proportional to 141.14, 211.44 and 109.28

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Solution

The fourth proportional to 141.14, 211.44 and 109.28 is: 163.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.14 : 211.44 = 109.28 : x
  2. Step 2: Convert to fraction form
    141.14/211.44 = 109.28/x
  3. Step 3: Cross multiply
    141.14x = 211.44 × 109.28
  4. Step 4: Simplify right side
    141.14x = 23,106.16
  5. Step 5: Solve for x
    x = 23,106.16/141.14
  6. Step 6: Final answer
    x = 163.71

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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.