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Finding the Fourth Proportional to 181.38, 272.12 and 73.18

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Solution

The fourth proportional to 181.38, 272.12 and 73.18 is: 109.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.38 : 272.12 = 73.18 : x
  2. Step 2: Convert to fraction form
    181.38/272.12 = 73.18/x
  3. Step 3: Cross multiply
    181.38x = 272.12 × 73.18
  4. Step 4: Simplify right side
    181.38x = 19,913.74
  5. Step 5: Solve for x
    x = 19,913.74/181.38
  6. Step 6: Final answer
    x = 109.79

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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.