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Finding the Fourth Proportional to 181.03, 271.47 and 72.79

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Solution

The fourth proportional to 181.03, 271.47 and 72.79 is: 109.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.03 : 271.47 = 72.79 : x
  2. Step 2: Convert to fraction form
    181.03/271.47 = 72.79/x
  3. Step 3: Cross multiply
    181.03x = 271.47 × 72.79
  4. Step 4: Simplify right side
    181.03x = 19,760.30
  5. Step 5: Solve for x
    x = 19,760.30/181.03
  6. Step 6: Final answer
    x = 109.15

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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.