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Finding the Fourth Proportional to 63.05, 94.48 and 47.87

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Solution

The fourth proportional to 63.05, 94.48 and 47.87 is: 71.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.05 : 94.48 = 47.87 : x
  2. Step 2: Convert to fraction form
    63.05/94.48 = 47.87/x
  3. Step 3: Cross multiply
    63.05x = 94.48 × 47.87
  4. Step 4: Simplify right side
    63.05x = 4,522.17
  5. Step 5: Solve for x
    x = 4,522.17/63.05
  6. Step 6: Final answer
    x = 71.72

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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.