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Finding the Fourth Proportional to 67.86, 94.07 and 63.72

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Solution

The fourth proportional to 67.86, 94.07 and 63.72 is: 88.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.86 : 94.07 = 63.72 : x
  2. Step 2: Convert to fraction form
    67.86/94.07 = 63.72/x
  3. Step 3: Cross multiply
    67.86x = 94.07 × 63.72
  4. Step 4: Simplify right side
    67.86x = 5,993.82
  5. Step 5: Solve for x
    x = 5,993.82/67.86
  6. Step 6: Final answer
    x = 88.33

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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.