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Finding the Fourth Proportional to 321,078.72, 481,635.36 and 133,901.76

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Solution

The fourth proportional to 321,078.72, 481,635.36 and 133,901.76 is: 200,859.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,078.72 : 481,635.36 = 133,901.76 : x
  2. Step 2: Convert to fraction form
    321,078.72/481,635.36 = 133,901.76/x
  3. Step 3: Cross multiply
    321,078.72x = 481,635.36 × 133,901.76
  4. Step 4: Simplify right side
    321,078.72x = 64,491,822,382.23
  5. Step 5: Solve for x
    x = 64,491,822,382.23/321,078.72
  6. Step 6: Final answer
    x = 200,859.85

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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.