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Finding the Fourth Proportional to 203,571.80, 305,211.90 and 85,182.20

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Solution

The fourth proportional to 203,571.80, 305,211.90 and 85,182.20 is: 127,712.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,571.80 : 305,211.90 = 85,182.20 : x
  2. Step 2: Convert to fraction form
    203,571.80/305,211.90 = 85,182.20/x
  3. Step 3: Cross multiply
    203,571.80x = 305,211.90 × 85,182.20
  4. Step 4: Simplify right side
    203,571.80x = 25,998,621,108.18
  5. Step 5: Solve for x
    x = 25,998,621,108.18/203,571.80
  6. Step 6: Final answer
    x = 127,712.29

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1.5x scale

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.