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Finding the Fourth Proportional to 133.33, 183.90 and 105.69

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Solution

The fourth proportional to 133.33, 183.90 and 105.69 is: 145.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.33 : 183.90 = 105.69 : x
  2. Step 2: Convert to fraction form
    133.33/183.90 = 105.69/x
  3. Step 3: Cross multiply
    133.33x = 183.90 × 105.69
  4. Step 4: Simplify right side
    133.33x = 19,436.39
  5. Step 5: Solve for x
    x = 19,436.39/133.33
  6. Step 6: Final answer
    x = 145.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.