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Finding the Fourth Proportional to 206,412.30, 309,618.45 and 117,838.80

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Solution

The fourth proportional to 206,412.30, 309,618.45 and 117,838.80 is: 176,758.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,412.30 : 309,618.45 = 117,838.80 : x
  2. Step 2: Convert to fraction form
    206,412.30/309,618.45 = 117,838.80/x
  3. Step 3: Cross multiply
    206,412.30x = 309,618.45 × 117,838.80
  4. Step 4: Simplify right side
    206,412.30x = 36,485,066,605.86
  5. Step 5: Solve for x
    x = 36,485,066,605.86/206,412.30
  6. Step 6: Final answer
    x = 176,758.20

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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.