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Finding the Fourth Proportional to 139.75, 192.94 and 104.50

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Solution

The fourth proportional to 139.75, 192.94 and 104.50 is: 144.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.75 : 192.94 = 104.50 : x
  2. Step 2: Convert to fraction form
    139.75/192.94 = 104.50/x
  3. Step 3: Cross multiply
    139.75x = 192.94 × 104.50
  4. Step 4: Simplify right side
    139.75x = 20,162.44
  5. Step 5: Solve for x
    x = 20,162.44/139.75
  6. Step 6: Final answer
    x = 144.27

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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.