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Finding the Fourth Proportional to 140.04, 194.07 and 138.08

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Solution

The fourth proportional to 140.04, 194.07 and 138.08 is: 191.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.04 : 194.07 = 138.08 : x
  2. Step 2: Convert to fraction form
    140.04/194.07 = 138.08/x
  3. Step 3: Cross multiply
    140.04x = 194.07 × 138.08
  4. Step 4: Simplify right side
    140.04x = 26,797.19
  5. Step 5: Solve for x
    x = 26,797.19/140.04
  6. Step 6: Final answer
    x = 191.35

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.