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Finding the Fourth Proportional to 149.28, 205.82 and 94

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Solution

The fourth proportional to 149.28, 205.82 and 94 is: 129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.28 : 205.82 = 94 : x
  2. Step 2: Convert to fraction form
    149.28/205.82 = 94/x
  3. Step 3: Cross multiply
    149.28x = 205.82 × 94
  4. Step 4: Simplify right side
    149.28x = 19,347.08
  5. Step 5: Solve for x
    x = 19,347.08/149.28
  6. Step 6: Final answer
    x = 129.60

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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.