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Finding the Fourth Proportional to 322,118.57, 483,140.90 and 85,479.71

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Solution

The fourth proportional to 322,118.57, 483,140.90 and 85,479.71 is: 128,209.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,118.57 : 483,140.90 = 85,479.71 : x
  2. Step 2: Convert to fraction form
    322,118.57/483,140.90 = 85,479.71/x
  3. Step 3: Cross multiply
    322,118.57x = 483,140.90 × 85,479.71
  4. Step 4: Simplify right side
    322,118.57x = 41,298,741,819.13
  5. Step 5: Solve for x
    x = 41,298,741,819.13/322,118.57
  6. Step 6: Final answer
    x = 128,209.75

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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.