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Finding the Fourth Proportional to 133.36, 183.87 and 86.67

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Solution

The fourth proportional to 133.36, 183.87 and 86.67 is: 119.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.36 : 183.87 = 86.67 : x
  2. Step 2: Convert to fraction form
    133.36/183.87 = 86.67/x
  3. Step 3: Cross multiply
    133.36x = 183.87 × 86.67
  4. Step 4: Simplify right side
    133.36x = 15,935.09
  5. Step 5: Solve for x
    x = 15,935.09/133.36
  6. Step 6: Final answer
    x = 119.49

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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.