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Finding the Fourth Proportional to 61.28, 91.92 and 17.95

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Solution

The fourth proportional to 61.28, 91.92 and 17.95 is: 26.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.28 : 91.92 = 17.95 : x
  2. Step 2: Convert to fraction form
    61.28/91.92 = 17.95/x
  3. Step 3: Cross multiply
    61.28x = 91.92 × 17.95
  4. Step 4: Simplify right side
    61.28x = 1,649.98
  5. Step 5: Solve for x
    x = 1,649.98/61.28
  6. Step 6: Final answer
    x = 26.92

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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.