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Finding the Fourth Proportional to 118.05, 177.47 and 111.77

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Solution

The fourth proportional to 118.05, 177.47 and 111.77 is: 168.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.05 : 177.47 = 111.77 : x
  2. Step 2: Convert to fraction form
    118.05/177.47 = 111.77/x
  3. Step 3: Cross multiply
    118.05x = 177.47 × 111.77
  4. Step 4: Simplify right side
    118.05x = 19,835.65
  5. Step 5: Solve for x
    x = 19,835.65/118.05
  6. Step 6: Final answer
    x = 168.03

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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.