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Finding the Fourth Proportional to 206,209.66, 309,308.73 and 65,976.70

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Solution

The fourth proportional to 206,209.66, 309,308.73 and 65,976.70 is: 98,963.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,209.66 : 309,308.73 = 65,976.70 : x
  2. Step 2: Convert to fraction form
    206,209.66/309,308.73 = 65,976.70/x
  3. Step 3: Cross multiply
    206,209.66x = 309,308.73 × 65,976.70
  4. Step 4: Simplify right side
    206,209.66x = 20,407,169,286.59
  5. Step 5: Solve for x
    x = 20,407,169,286.59/206,209.66
  6. Step 6: Final answer
    x = 98,963.21

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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.