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Finding the Fourth Proportional to 149.28, 205.97 and 93.25

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Solution

The fourth proportional to 149.28, 205.97 and 93.25 is: 128.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.28 : 205.97 = 93.25 : x
  2. Step 2: Convert to fraction form
    149.28/205.97 = 93.25/x
  3. Step 3: Cross multiply
    149.28x = 205.97 × 93.25
  4. Step 4: Simplify right side
    149.28x = 19,206.70
  5. Step 5: Solve for x
    x = 19,206.70/149.28
  6. Step 6: Final answer
    x = 128.66

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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.