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Finding the Fourth Proportional to 207,957.87, 311,904.27 and 67,715.55

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Solution

The fourth proportional to 207,957.87, 311,904.27 and 67,715.55 is: 101,562.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,957.87 : 311,904.27 = 67,715.55 : x
  2. Step 2: Convert to fraction form
    207,957.87/311,904.27 = 67,715.55/x
  3. Step 3: Cross multiply
    207,957.87x = 311,904.27 × 67,715.55
  4. Step 4: Simplify right side
    207,957.87x = 21,120,769,190.40
  5. Step 5: Solve for x
    x = 21,120,769,190.40/207,957.87
  6. Step 6: Final answer
    x = 101,562.73

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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.