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Finding the Fourth Proportional to 67.78, 93.68 and 50.32

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Solution

The fourth proportional to 67.78, 93.68 and 50.32 is: 69.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.78 : 93.68 = 50.32 : x
  2. Step 2: Convert to fraction form
    67.78/93.68 = 50.32/x
  3. Step 3: Cross multiply
    67.78x = 93.68 × 50.32
  4. Step 4: Simplify right side
    67.78x = 4,713.73
  5. Step 5: Solve for x
    x = 4,713.73/67.78
  6. Step 6: Final answer
    x = 69.54

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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.