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Finding the Fourth Proportional to 181.90, 251.02 and 99.01

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Solution

The fourth proportional to 181.90, 251.02 and 99.01 is: 136.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.90 : 251.02 = 99.01 : x
  2. Step 2: Convert to fraction form
    181.90/251.02 = 99.01/x
  3. Step 3: Cross multiply
    181.90x = 251.02 × 99.01
  4. Step 4: Simplify right side
    181.90x = 24,852.24
  5. Step 5: Solve for x
    x = 24,852.24/181.90
  6. Step 6: Final answer
    x = 136.63

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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.