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Finding the Fourth Proportional to 207,920.76, 311,919.57 and 65,801.85

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Solution

The fourth proportional to 207,920.76, 311,919.57 and 65,801.85 is: 98,714.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,920.76 : 311,919.57 = 65,801.85 : x
  2. Step 2: Convert to fraction form
    207,920.76/311,919.57 = 65,801.85/x
  3. Step 3: Cross multiply
    207,920.76x = 311,919.57 × 65,801.85
  4. Step 4: Simplify right side
    207,920.76x = 20,524,884,757.20
  5. Step 5: Solve for x
    x = 20,524,884,757.20/207,920.76
  6. Step 6: Final answer
    x = 98,714.94

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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.