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Finding the Fourth Proportional to 111,919.30, 167,725.35 and 91,183.30

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Solution

The fourth proportional to 111,919.30, 167,725.35 and 91,183.30 is: 136,649.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,919.30 : 167,725.35 = 91,183.30 : x
  2. Step 2: Convert to fraction form
    111,919.30/167,725.35 = 91,183.30/x
  3. Step 3: Cross multiply
    111,919.30x = 167,725.35 × 91,183.30
  4. Step 4: Simplify right side
    111,919.30x = 15,293,750,906.66
  5. Step 5: Solve for x
    x = 15,293,750,906.66/111,919.30
  6. Step 6: Final answer
    x = 136,649.81

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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.