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Finding the Fourth Proportional to 118.31, 177.40 and 41.25

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Solution

The fourth proportional to 118.31, 177.40 and 41.25 is: 61.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.31 : 177.40 = 41.25 : x
  2. Step 2: Convert to fraction form
    118.31/177.40 = 41.25/x
  3. Step 3: Cross multiply
    118.31x = 177.40 × 41.25
  4. Step 4: Simplify right side
    118.31x = 7,317.24
  5. Step 5: Solve for x
    x = 7,317.24/118.31
  6. Step 6: Final answer
    x = 61.85

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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.