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Finding the Fourth Proportional to 181.37, 249.80 and 156.80

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Solution

The fourth proportional to 181.37, 249.80 and 156.80 is: 215.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.37 : 249.80 = 156.80 : x
  2. Step 2: Convert to fraction form
    181.37/249.80 = 156.80/x
  3. Step 3: Cross multiply
    181.37x = 249.80 × 156.80
  4. Step 4: Simplify right side
    181.37x = 39,166.61
  5. Step 5: Solve for x
    x = 39,166.61/181.37
  6. Step 6: Final answer
    x = 215.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.