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Finding the Fourth Proportional to 194.21, 291.39 and 96.70

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Solution

The fourth proportional to 194.21, 291.39 and 96.70 is: 145.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.21 : 291.39 = 96.70 : x
  2. Step 2: Convert to fraction form
    194.21/291.39 = 96.70/x
  3. Step 3: Cross multiply
    194.21x = 291.39 × 96.70
  4. Step 4: Simplify right side
    194.21x = 28,177.41
  5. Step 5: Solve for x
    x = 28,177.41/194.21
  6. Step 6: Final answer
    x = 145.09

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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.