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Finding the Fourth Proportional to 203,472.28, 305,246.70 and 81,902.12

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Solution

The fourth proportional to 203,472.28, 305,246.70 and 81,902.12 is: 122,868.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,472.28 : 305,246.70 = 81,902.12 : x
  2. Step 2: Convert to fraction form
    203,472.28/305,246.70 = 81,902.12/x
  3. Step 3: Cross multiply
    203,472.28x = 305,246.70 × 81,902.12
  4. Step 4: Simplify right side
    203,472.28x = 25,000,351,853.00
  5. Step 5: Solve for x
    x = 25,000,351,853.00/203,472.28
  6. Step 6: Final answer
    x = 122,868.59

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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.