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Finding the Fourth Proportional to 140.02, 209.79 and 118.33

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Solution

The fourth proportional to 140.02, 209.79 and 118.33 is: 177.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.02 : 209.79 = 118.33 : x
  2. Step 2: Convert to fraction form
    140.02/209.79 = 118.33/x
  3. Step 3: Cross multiply
    140.02x = 209.79 × 118.33
  4. Step 4: Simplify right side
    140.02x = 24,824.45
  5. Step 5: Solve for x
    x = 24,824.45/140.02
  6. Step 6: Final answer
    x = 177.29

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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.