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Finding the Fourth Proportional to 128,544.30, 192,816.45 and 125,919.90

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Solution

The fourth proportional to 128,544.30, 192,816.45 and 125,919.90 is: 188,879.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,544.30 : 192,816.45 = 125,919.90 : x
  2. Step 2: Convert to fraction form
    128,544.30/192,816.45 = 125,919.90/x
  3. Step 3: Cross multiply
    128,544.30x = 192,816.45 × 125,919.90
  4. Step 4: Simplify right side
    128,544.30x = 24,279,428,102.36
  5. Step 5: Solve for x
    x = 24,279,428,102.36/128,544.30
  6. Step 6: Final answer
    x = 188,879.85

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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.