Home / 208,311,667.28-287,469,581.64-115,489,785.68

Finding the Fourth Proportional to 208,311,667.28, 287,469,581.64 and 115,489,785.68

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Solution

The fourth proportional to 208,311,667.28, 287,469,581.64 and 115,489,785.68 is: 159,375,616.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,311,667.28 : 287,469,581.64 = 115,489,785.68 : x
  2. Step 2: Convert to fraction form
    208,311,667.28/287,469,581.64 = 115,489,785.68/x
  3. Step 3: Cross multiply
    208,311,667.28x = 287,469,581.64 × 115,489,785.68
  4. Step 4: Simplify right side
    208,311,667.28x = 33,199,800,373,122,864
  5. Step 5: Solve for x
    x = 33,199,800,373,122,864/208,311,667.28
  6. Step 6: Final answer
    x = 159,375,616.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.