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Finding the Fourth Proportional to 133.27, 183.98 and 86.65

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Solution

The fourth proportional to 133.27, 183.98 and 86.65 is: 119.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.27 : 183.98 = 86.65 : x
  2. Step 2: Convert to fraction form
    133.27/183.98 = 86.65/x
  3. Step 3: Cross multiply
    133.27x = 183.98 × 86.65
  4. Step 4: Simplify right side
    133.27x = 15,941.87
  5. Step 5: Solve for x
    x = 15,941.87/133.27
  6. Step 6: Final answer
    x = 119.62

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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.