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Finding the Fourth Proportional to 181.75, 272.81 and 79.08

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Solution

The fourth proportional to 181.75, 272.81 and 79.08 is: 118.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.75 : 272.81 = 79.08 : x
  2. Step 2: Convert to fraction form
    181.75/272.81 = 79.08/x
  3. Step 3: Cross multiply
    181.75x = 272.81 × 79.08
  4. Step 4: Simplify right side
    181.75x = 21,573.81
  5. Step 5: Solve for x
    x = 21,573.81/181.75
  6. Step 6: Final answer
    x = 118.70

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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.