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Finding the Fourth Proportional to 181.07, 271.38 and 72.80

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Solution

The fourth proportional to 181.07, 271.38 and 72.80 is: 109.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.07 : 271.38 = 72.80 : x
  2. Step 2: Convert to fraction form
    181.07/271.38 = 72.80/x
  3. Step 3: Cross multiply
    181.07x = 271.38 × 72.80
  4. Step 4: Simplify right side
    181.07x = 19,756.46
  5. Step 5: Solve for x
    x = 19,756.46/181.07
  6. Step 6: Final answer
    x = 109.11

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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.