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Finding the Fourth Proportional to 149.25, 223.65 and 67.98

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Solution

The fourth proportional to 149.25, 223.65 and 67.98 is: 101.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.25 : 223.65 = 67.98 : x
  2. Step 2: Convert to fraction form
    149.25/223.65 = 67.98/x
  3. Step 3: Cross multiply
    149.25x = 223.65 × 67.98
  4. Step 4: Simplify right side
    149.25x = 15,203.73
  5. Step 5: Solve for x
    x = 15,203.73/149.25
  6. Step 6: Final answer
    x = 101.87

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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.