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Finding the Fourth Proportional to 118.36, 176.75 and 117.09

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Solution

The fourth proportional to 118.36, 176.75 and 117.09 is: 174.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.36 : 176.75 = 117.09 : x
  2. Step 2: Convert to fraction form
    118.36/176.75 = 117.09/x
  3. Step 3: Cross multiply
    118.36x = 176.75 × 117.09
  4. Step 4: Simplify right side
    118.36x = 20,694.85
  5. Step 5: Solve for x
    x = 20,694.85/118.36
  6. Step 6: Final answer
    x = 174.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.