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Finding the Fourth Proportional to 181.99, 251.15 and 99.10

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Solution

The fourth proportional to 181.99, 251.15 and 99.10 is: 136.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.99 : 251.15 = 99.10 : x
  2. Step 2: Convert to fraction form
    181.99/251.15 = 99.10/x
  3. Step 3: Cross multiply
    181.99x = 251.15 × 99.10
  4. Step 4: Simplify right side
    181.99x = 24,890.47
  5. Step 5: Solve for x
    x = 24,890.47/181.99
  6. Step 6: Final answer
    x = 136.77

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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.