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Finding the Fourth Proportional to 185.82, 278.21 and 120.89

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Solution

The fourth proportional to 185.82, 278.21 and 120.89 is: 181.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.82 : 278.21 = 120.89 : x
  2. Step 2: Convert to fraction form
    185.82/278.21 = 120.89/x
  3. Step 3: Cross multiply
    185.82x = 278.21 × 120.89
  4. Step 4: Simplify right side
    185.82x = 33,632.20
  5. Step 5: Solve for x
    x = 33,632.20/185.82
  6. Step 6: Final answer
    x = 181.00

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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.