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Finding the Fourth Proportional to 207,900, 311,869.44 and 67,620.96

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Solution

The fourth proportional to 207,900, 311,869.44 and 67,620.96 is: 101,437.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,900 : 311,869.44 = 67,620.96 : x
  2. Step 2: Convert to fraction form
    207,900/311,869.44 = 67,620.96/x
  3. Step 3: Cross multiply
    207,900x = 311,869.44 × 67,620.96
  4. Step 4: Simplify right side
    207,900x = 21,088,910,927.46
  5. Step 5: Solve for x
    x = 21,088,910,927.46/207,900
  6. Step 6: Final answer
    x = 101,437.76

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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.