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Finding the Fourth Proportional to 207,915.87, 311,912.30 and 65,796.92

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Solution

The fourth proportional to 207,915.87, 311,912.30 and 65,796.92 is: 98,707.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,915.87 : 311,912.30 = 65,796.92 : x
  2. Step 2: Convert to fraction form
    207,915.87/311,912.30 = 65,796.92/x
  3. Step 3: Cross multiply
    207,915.87x = 311,912.30 × 65,796.92
  4. Step 4: Simplify right side
    207,915.87x = 20,522,868,424.72
  5. Step 5: Solve for x
    x = 20,522,868,424.72/207,915.87
  6. Step 6: Final answer
    x = 98,707.56

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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.