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Finding the Fourth Proportional to 149.50, 223.77 and 80.86

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Solution

The fourth proportional to 149.50, 223.77 and 80.86 is: 121.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.50 : 223.77 = 80.86 : x
  2. Step 2: Convert to fraction form
    149.50/223.77 = 80.86/x
  3. Step 3: Cross multiply
    149.50x = 223.77 × 80.86
  4. Step 4: Simplify right side
    149.50x = 18,094.04
  5. Step 5: Solve for x
    x = 18,094.04/149.50
  6. Step 6: Final answer
    x = 121.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.