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Finding the Fourth Proportional to 189.25, 283.83 and 67.49

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Solution

The fourth proportional to 189.25, 283.83 and 67.49 is: 101.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.25 : 283.83 = 67.49 : x
  2. Step 2: Convert to fraction form
    189.25/283.83 = 67.49/x
  3. Step 3: Cross multiply
    189.25x = 283.83 × 67.49
  4. Step 4: Simplify right side
    189.25x = 19,156.40
  5. Step 5: Solve for x
    x = 19,156.40/189.25
  6. Step 6: Final answer
    x = 101.22

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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.