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Finding the Fourth Proportional to 118.75, 178.26 and 54.64

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Solution

The fourth proportional to 118.75, 178.26 and 54.64 is: 82.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.75 : 178.26 = 54.64 : x
  2. Step 2: Convert to fraction form
    118.75/178.26 = 54.64/x
  3. Step 3: Cross multiply
    118.75x = 178.26 × 54.64
  4. Step 4: Simplify right side
    118.75x = 9,740.13
  5. Step 5: Solve for x
    x = 9,740.13/118.75
  6. Step 6: Final answer
    x = 82.02

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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.