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Finding the Fourth Proportional to 71.82, 107.74 and 26.17

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Solution

The fourth proportional to 71.82, 107.74 and 26.17 is: 39.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.82 : 107.74 = 26.17 : x
  2. Step 2: Convert to fraction form
    71.82/107.74 = 26.17/x
  3. Step 3: Cross multiply
    71.82x = 107.74 × 26.17
  4. Step 4: Simplify right side
    71.82x = 2,819.56
  5. Step 5: Solve for x
    x = 2,819.56/71.82
  6. Step 6: Final answer
    x = 39.26

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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.