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Finding the Fourth Proportional to 203,425.30, 305,247.30 and 85,108.60

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Solution

The fourth proportional to 203,425.30, 305,247.30 and 85,108.60 is: 127,708.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,425.30 : 305,247.30 = 85,108.60 : x
  2. Step 2: Convert to fraction form
    203,425.30/305,247.30 = 85,108.60/x
  3. Step 3: Cross multiply
    203,425.30x = 305,247.30 × 85,108.60
  4. Step 4: Simplify right side
    203,425.30x = 25,979,170,356.78
  5. Step 5: Solve for x
    x = 25,979,170,356.78/203,425.30
  6. Step 6: Final answer
    x = 127,708.65

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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.