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Finding the Fourth Proportional to 111,183.42, 166,774.77 and 85,919.61

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Solution

The fourth proportional to 111,183.42, 166,774.77 and 85,919.61 is: 128,879.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,183.42 : 166,774.77 = 85,919.61 : x
  2. Step 2: Convert to fraction form
    111,183.42/166,774.77 = 85,919.61/x
  3. Step 3: Cross multiply
    111,183.42x = 166,774.77 × 85,919.61
  4. Step 4: Simplify right side
    111,183.42x = 14,329,223,196.24
  5. Step 5: Solve for x
    x = 14,329,223,196.24/111,183.42
  6. Step 6: Final answer
    x = 128,879.14

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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.