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Finding the Fourth Proportional to 71.62, 107.43 and 28.27

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Solution

The fourth proportional to 71.62, 107.43 and 28.27 is: 42.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.62 : 107.43 = 28.27 : x
  2. Step 2: Convert to fraction form
    71.62/107.43 = 28.27/x
  3. Step 3: Cross multiply
    71.62x = 107.43 × 28.27
  4. Step 4: Simplify right side
    71.62x = 3,037.05
  5. Step 5: Solve for x
    x = 3,037.05/71.62
  6. Step 6: Final answer
    x = 42.41

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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.