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Finding the Fourth Proportional to 140, 209.44 and 131.36

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Solution

The fourth proportional to 140, 209.44 and 131.36 is: 196.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    140 : 209.44 = 131.36 : x
  2. Step 2: Convert to fraction form
    140/209.44 = 131.36/x
  3. Step 3: Cross multiply
    140x = 209.44 × 131.36
  4. Step 4: Simplify right side
    140x = 27,512.04
  5. Step 5: Solve for x
    x = 27,512.04/140
  6. Step 6: Final answer
    x = 196.51

Related Problems

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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.