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Finding the Fourth Proportional to 206,410.20, 309,615.30 and 127,678.20

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Solution

The fourth proportional to 206,410.20, 309,615.30 and 127,678.20 is: 191,517.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,410.20 : 309,615.30 = 127,678.20 : x
  2. Step 2: Convert to fraction form
    206,410.20/309,615.30 = 127,678.20/x
  3. Step 3: Cross multiply
    206,410.20x = 309,615.30 × 127,678.20
  4. Step 4: Simplify right side
    206,410.20x = 39,531,124,196.46
  5. Step 5: Solve for x
    x = 39,531,124,196.46/206,410.20
  6. Step 6: Final answer
    x = 191,517.30

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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.