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Finding the Fourth Proportional to 194.09, 267.71 and 120.31

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Solution

The fourth proportional to 194.09, 267.71 and 120.31 is: 165.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.09 : 267.71 = 120.31 : x
  2. Step 2: Convert to fraction form
    194.09/267.71 = 120.31/x
  3. Step 3: Cross multiply
    194.09x = 267.71 × 120.31
  4. Step 4: Simplify right side
    194.09x = 32,208.19
  5. Step 5: Solve for x
    x = 32,208.19/194.09
  6. Step 6: Final answer
    x = 165.94

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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.