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Finding the Fourth Proportional to 149.98, 224.78 and 84.95

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Solution

The fourth proportional to 149.98, 224.78 and 84.95 is: 127.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.98 : 224.78 = 84.95 : x
  2. Step 2: Convert to fraction form
    149.98/224.78 = 84.95/x
  3. Step 3: Cross multiply
    149.98x = 224.78 × 84.95
  4. Step 4: Simplify right side
    149.98x = 19,093.94
  5. Step 5: Solve for x
    x = 19,093.94/149.98
  6. Step 6: Final answer
    x = 127.31

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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.