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Finding the Fourth Proportional to 194.08, 267.82 and 128.76

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Solution

The fourth proportional to 194.08, 267.82 and 128.76 is: 177.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.08 : 267.82 = 128.76 : x
  2. Step 2: Convert to fraction form
    194.08/267.82 = 128.76/x
  3. Step 3: Cross multiply
    194.08x = 267.82 × 128.76
  4. Step 4: Simplify right side
    194.08x = 34,484.50
  5. Step 5: Solve for x
    x = 34,484.50/194.08
  6. Step 6: Final answer
    x = 177.68

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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.