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Finding the Fourth Proportional to 61.96, 92.94 and 19.21

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Solution

The fourth proportional to 61.96, 92.94 and 19.21 is: 28.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.96 : 92.94 = 19.21 : x
  2. Step 2: Convert to fraction form
    61.96/92.94 = 19.21/x
  3. Step 3: Cross multiply
    61.96x = 92.94 × 19.21
  4. Step 4: Simplify right side
    61.96x = 1,785.38
  5. Step 5: Solve for x
    x = 1,785.38/61.96
  6. Step 6: Final answer
    x = 28.82

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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.