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Finding the Fourth Proportional to 63.82, 88.40 and 61.05

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Solution

The fourth proportional to 63.82, 88.40 and 61.05 is: 84.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.82 : 88.40 = 61.05 : x
  2. Step 2: Convert to fraction form
    63.82/88.40 = 61.05/x
  3. Step 3: Cross multiply
    63.82x = 88.40 × 61.05
  4. Step 4: Simplify right side
    63.82x = 5,396.82
  5. Step 5: Solve for x
    x = 5,396.82/63.82
  6. Step 6: Final answer
    x = 84.56

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.