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Finding the Fourth Proportional to 181.88, 273.01 and 79.21

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Solution

The fourth proportional to 181.88, 273.01 and 79.21 is: 118.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.88 : 273.01 = 79.21 : x
  2. Step 2: Convert to fraction form
    181.88/273.01 = 79.21/x
  3. Step 3: Cross multiply
    181.88x = 273.01 × 79.21
  4. Step 4: Simplify right side
    181.88x = 21,625.12
  5. Step 5: Solve for x
    x = 21,625.12/181.88
  6. Step 6: Final answer
    x = 118.90

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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.