Home / 203,764.08-305,215.20-128,845.56

Finding the Fourth Proportional to 203,764.08, 305,215.20 and 128,845.56

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Solution

The fourth proportional to 203,764.08, 305,215.20 and 128,845.56 is: 192,995.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,764.08 : 305,215.20 = 128,845.56 : x
  2. Step 2: Convert to fraction form
    203,764.08/305,215.20 = 128,845.56/x
  3. Step 3: Cross multiply
    203,764.08x = 305,215.20 × 128,845.56
  4. Step 4: Simplify right side
    203,764.08x = 39,325,623,364.51
  5. Step 5: Solve for x
    x = 39,325,623,364.51/203,764.08
  6. Step 6: Final answer
    x = 192,995.86

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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.