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Finding the Fourth Proportional to 200,209.96, 300,105.72 and 66,980.62

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Solution

The fourth proportional to 200,209.96, 300,105.72 and 66,980.62 is: 100,400.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,209.96 : 300,105.72 = 66,980.62 : x
  2. Step 2: Convert to fraction form
    200,209.96/300,105.72 = 66,980.62/x
  3. Step 3: Cross multiply
    200,209.96x = 300,105.72 × 66,980.62
  4. Step 4: Simplify right side
    200,209.96x = 20,101,267,191.15
  5. Step 5: Solve for x
    x = 20,101,267,191.15/200,209.96
  6. Step 6: Final answer
    x = 100,400.94

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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.