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Finding the Fourth Proportional to 207,538.88, 311,353.80 and 67,311.68

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Solution

The fourth proportional to 207,538.88, 311,353.80 and 67,311.68 is: 100,982.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,538.88 : 311,353.80 = 67,311.68 : x
  2. Step 2: Convert to fraction form
    207,538.88/311,353.80 = 67,311.68/x
  3. Step 3: Cross multiply
    207,538.88x = 311,353.80 × 67,311.68
  4. Step 4: Simplify right side
    207,538.88x = 20,957,747,352.38
  5. Step 5: Solve for x
    x = 20,957,747,352.38/207,538.88
  6. Step 6: Final answer
    x = 100,982.27

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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.