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Finding the Fourth Proportional to 76.82, 106.03 and 49.18

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Solution

The fourth proportional to 76.82, 106.03 and 49.18 is: 67.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.82 : 106.03 = 49.18 : x
  2. Step 2: Convert to fraction form
    76.82/106.03 = 49.18/x
  3. Step 3: Cross multiply
    76.82x = 106.03 × 49.18
  4. Step 4: Simplify right side
    76.82x = 5,214.17
  5. Step 5: Solve for x
    x = 5,214.17/76.82
  6. Step 6: Final answer
    x = 67.88

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