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Finding the Fourth Proportional to 206,430.80, 309,934.20 and 132,011.60

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Solution

The fourth proportional to 206,430.80, 309,934.20 and 132,011.60 is: 198,201.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,430.80 : 309,934.20 = 132,011.60 : x
  2. Step 2: Convert to fraction form
    206,430.80/309,934.20 = 132,011.60/x
  3. Step 3: Cross multiply
    206,430.80x = 309,934.20 × 132,011.60
  4. Step 4: Simplify right side
    206,430.80x = 40,914,909,636.72
  5. Step 5: Solve for x
    x = 40,914,909,636.72/206,430.80
  6. Step 6: Final answer
    x = 198,201.57

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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.