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Finding the Fourth Proportional to 203,558.80, 305,338.20 and 140,573.20

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Solution

The fourth proportional to 203,558.80, 305,338.20 and 140,573.20 is: 210,859.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,558.80 : 305,338.20 = 140,573.20 : x
  2. Step 2: Convert to fraction form
    203,558.80/305,338.20 = 140,573.20/x
  3. Step 3: Cross multiply
    203,558.80x = 305,338.20 × 140,573.20
  4. Step 4: Simplify right side
    203,558.80x = 42,922,367,856.24
  5. Step 5: Solve for x
    x = 42,922,367,856.24/203,558.80
  6. Step 6: Final answer
    x = 210,859.80

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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.