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Finding the Fourth Proportional to 110.28, 151.98 and 81.18

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Solution

The fourth proportional to 110.28, 151.98 and 81.18 is: 111.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.28 : 151.98 = 81.18 : x
  2. Step 2: Convert to fraction form
    110.28/151.98 = 81.18/x
  3. Step 3: Cross multiply
    110.28x = 151.98 × 81.18
  4. Step 4: Simplify right side
    110.28x = 12,337.74
  5. Step 5: Solve for x
    x = 12,337.74/110.28
  6. Step 6: Final answer
    x = 111.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.