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Finding the Fourth Proportional to 101.25, 139.83 and 75.33

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Solution

The fourth proportional to 101.25, 139.83 and 75.33 is: 104.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.25 : 139.83 = 75.33 : x
  2. Step 2: Convert to fraction form
    101.25/139.83 = 75.33/x
  3. Step 3: Cross multiply
    101.25x = 139.83 × 75.33
  4. Step 4: Simplify right side
    101.25x = 10,533.39
  5. Step 5: Solve for x
    x = 10,533.39/101.25
  6. Step 6: Final answer
    x = 104.03

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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.