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Finding the Fourth Proportional to 188.94, 283.43 and 107.85

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Solution

The fourth proportional to 188.94, 283.43 and 107.85 is: 161.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.94 : 283.43 = 107.85 : x
  2. Step 2: Convert to fraction form
    188.94/283.43 = 107.85/x
  3. Step 3: Cross multiply
    188.94x = 283.43 × 107.85
  4. Step 4: Simplify right side
    188.94x = 30,567.39
  5. Step 5: Solve for x
    x = 30,567.39/188.94
  6. Step 6: Final answer
    x = 161.78

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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.