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Finding the Fourth Proportional to 149.18, 205.94 and 93.15

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Solution

The fourth proportional to 149.18, 205.94 and 93.15 is: 128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.18 : 205.94 = 93.15 : x
  2. Step 2: Convert to fraction form
    149.18/205.94 = 93.15/x
  3. Step 3: Cross multiply
    149.18x = 205.94 × 93.15
  4. Step 4: Simplify right side
    149.18x = 19,183.54
  5. Step 5: Solve for x
    x = 19,183.54/149.18
  6. Step 6: Final answer
    x = 128.60

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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.