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Finding the Fourth Proportional to 99.27, 136.83 and 79.83

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Solution

The fourth proportional to 99.27, 136.83 and 79.83 is: 110.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.27 : 136.83 = 79.83 : x
  2. Step 2: Convert to fraction form
    99.27/136.83 = 79.83/x
  3. Step 3: Cross multiply
    99.27x = 136.83 × 79.83
  4. Step 4: Simplify right side
    99.27x = 10,923.14
  5. Step 5: Solve for x
    x = 10,923.14/99.27
  6. Step 6: Final answer
    x = 110.03

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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.