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Finding the Fourth Proportional to 133.10, 183.70 and 83.97

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Solution

The fourth proportional to 133.10, 183.70 and 83.97 is: 115.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.10 : 183.70 = 83.97 : x
  2. Step 2: Convert to fraction form
    133.10/183.70 = 83.97/x
  3. Step 3: Cross multiply
    133.10x = 183.70 × 83.97
  4. Step 4: Simplify right side
    133.10x = 15,425.29
  5. Step 5: Solve for x
    x = 15,425.29/133.10
  6. Step 6: Final answer
    x = 115.89

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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.