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Finding the Fourth Proportional to 149.70, 206.45 and 94.42

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Solution

The fourth proportional to 149.70, 206.45 and 94.42 is: 130.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.70 : 206.45 = 94.42 : x
  2. Step 2: Convert to fraction form
    149.70/206.45 = 94.42/x
  3. Step 3: Cross multiply
    149.70x = 206.45 × 94.42
  4. Step 4: Simplify right side
    149.70x = 19,493.01
  5. Step 5: Solve for x
    x = 19,493.01/149.70
  6. Step 6: Final answer
    x = 130.21

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.