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Finding the Fourth Proportional to 44.78, 67.12 and 21.94

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Solution

The fourth proportional to 44.78, 67.12 and 21.94 is: 32.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.78 : 67.12 = 21.94 : x
  2. Step 2: Convert to fraction form
    44.78/67.12 = 21.94/x
  3. Step 3: Cross multiply
    44.78x = 67.12 × 21.94
  4. Step 4: Simplify right side
    44.78x = 1,472.39
  5. Step 5: Solve for x
    x = 1,472.39/44.78
  6. Step 6: Final answer
    x = 32.88

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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.