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Finding the Fourth Proportional to 207,958.12, 311,904.54 and 67,715.56

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Solution

The fourth proportional to 207,958.12, 311,904.54 and 67,715.56 is: 101,562.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,958.12 : 311,904.54 = 67,715.56 : x
  2. Step 2: Convert to fraction form
    207,958.12/311,904.54 = 67,715.56/x
  3. Step 3: Cross multiply
    207,958.12x = 311,904.54 × 67,715.56
  4. Step 4: Simplify right side
    207,958.12x = 21,120,790,592.64
  5. Step 5: Solve for x
    x = 21,120,790,592.64/207,958.12
  6. Step 6: Final answer
    x = 101,562.71

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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.