Home / 203,741.20-305,698.20-128,918.80

Finding the Fourth Proportional to 203,741.20, 305,698.20 and 128,918.80

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Solution

The fourth proportional to 203,741.20, 305,698.20 and 128,918.80 is: 193,432.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,741.20 : 305,698.20 = 128,918.80 : x
  2. Step 2: Convert to fraction form
    203,741.20/305,698.20 = 128,918.80/x
  3. Step 3: Cross multiply
    203,741.20x = 305,698.20 × 128,918.80
  4. Step 4: Simplify right side
    203,741.20x = 39,410,245,106.16
  5. Step 5: Solve for x
    x = 39,410,245,106.16/203,741.20
  6. Step 6: Final answer
    x = 193,432.87

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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.