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Finding the Fourth Proportional to 194.05, 267.58 and 138.76

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Solution

The fourth proportional to 194.05, 267.58 and 138.76 is: 191.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.05 : 267.58 = 138.76 : x
  2. Step 2: Convert to fraction form
    194.05/267.58 = 138.76/x
  3. Step 3: Cross multiply
    194.05x = 267.58 × 138.76
  4. Step 4: Simplify right side
    194.05x = 37,128.71
  5. Step 5: Solve for x
    x = 37,128.71/194.05
  6. Step 6: Final answer
    x = 191.34

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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.