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Finding the Fourth Proportional to 203,497.20, 305,245.80 and 85,156.20

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Solution

The fourth proportional to 203,497.20, 305,245.80 and 85,156.20 is: 127,734.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,497.20 : 305,245.80 = 85,156.20 : x
  2. Step 2: Convert to fraction form
    203,497.20/305,245.80 = 85,156.20/x
  3. Step 3: Cross multiply
    203,497.20x = 305,245.80 × 85,156.20
  4. Step 4: Simplify right side
    203,497.20x = 25,993,572,393.96
  5. Step 5: Solve for x
    x = 25,993,572,393.96/203,497.20
  6. Step 6: Final answer
    x = 127,734.30

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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.