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Finding the Fourth Proportional to 135,919.80, 203,879.70 and 125,422.20

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Solution

The fourth proportional to 135,919.80, 203,879.70 and 125,422.20 is: 188,133.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,919.80 : 203,879.70 = 125,422.20 : x
  2. Step 2: Convert to fraction form
    135,919.80/203,879.70 = 125,422.20/x
  3. Step 3: Cross multiply
    135,919.80x = 203,879.70 × 125,422.20
  4. Step 4: Simplify right side
    135,919.80x = 25,571,040,509.34
  5. Step 5: Solve for x
    x = 25,571,040,509.34/135,919.80
  6. Step 6: Final answer
    x = 188,133.30

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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.