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Finding the Fourth Proportional to 133.30, 183.97 and 80.86

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Solution

The fourth proportional to 133.30, 183.97 and 80.86 is: 111.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.30 : 183.97 = 80.86 : x
  2. Step 2: Convert to fraction form
    133.30/183.97 = 80.86/x
  3. Step 3: Cross multiply
    133.30x = 183.97 × 80.86
  4. Step 4: Simplify right side
    133.30x = 14,875.81
  5. Step 5: Solve for x
    x = 14,875.81/133.30
  6. Step 6: Final answer
    x = 111.60

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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.