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Finding the Fourth Proportional to 63.11, 86.86 and 62.03

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Solution

The fourth proportional to 63.11, 86.86 and 62.03 is: 85.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.11 : 86.86 = 62.03 : x
  2. Step 2: Convert to fraction form
    63.11/86.86 = 62.03/x
  3. Step 3: Cross multiply
    63.11x = 86.86 × 62.03
  4. Step 4: Simplify right side
    63.11x = 5,387.93
  5. Step 5: Solve for x
    x = 5,387.93/63.11
  6. Step 6: Final answer
    x = 85.37

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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.