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Finding the Fourth Proportional to 181.80, 272.72 and 79.08

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Solution

The fourth proportional to 181.80, 272.72 and 79.08 is: 118.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.80 : 272.72 = 79.08 : x
  2. Step 2: Convert to fraction form
    181.80/272.72 = 79.08/x
  3. Step 3: Cross multiply
    181.80x = 272.72 × 79.08
  4. Step 4: Simplify right side
    181.80x = 21,566.30
  5. Step 5: Solve for x
    x = 21,566.30/181.80
  6. Step 6: Final answer
    x = 118.63

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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.