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Finding the Fourth Proportional to 207,806.40, 311,512.32 and 67,466.88

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Solution

The fourth proportional to 207,806.40, 311,512.32 and 67,466.88 is: 101,136.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,806.40 : 311,512.32 = 67,466.88 : x
  2. Step 2: Convert to fraction form
    207,806.40/311,512.32 = 67,466.88/x
  3. Step 3: Cross multiply
    207,806.40x = 311,512.32 × 67,466.88
  4. Step 4: Simplify right side
    207,806.40x = 21,016,764,311.96
  5. Step 5: Solve for x
    x = 21,016,764,311.96/207,806.40
  6. Step 6: Final answer
    x = 101,136.27

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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.