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Finding the Fourth Proportional to 177.75, 245.23 and 112.21

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Solution

The fourth proportional to 177.75, 245.23 and 112.21 is: 154.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.75 : 245.23 = 112.21 : x
  2. Step 2: Convert to fraction form
    177.75/245.23 = 112.21/x
  3. Step 3: Cross multiply
    177.75x = 245.23 × 112.21
  4. Step 4: Simplify right side
    177.75x = 27,517.26
  5. Step 5: Solve for x
    x = 27,517.26/177.75
  6. Step 6: Final answer
    x = 154.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.