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Finding the Fourth Proportional to 76.44, 105.49 and 41.94

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Solution

The fourth proportional to 76.44, 105.49 and 41.94 is: 57.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.44 : 105.49 = 41.94 : x
  2. Step 2: Convert to fraction form
    76.44/105.49 = 41.94/x
  3. Step 3: Cross multiply
    76.44x = 105.49 × 41.94
  4. Step 4: Simplify right side
    76.44x = 4,424.25
  5. Step 5: Solve for x
    x = 4,424.25/76.44
  6. Step 6: Final answer
    x = 57.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.