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Finding the Fourth Proportional to 205,514.70, 308,041.65 and 105,636.30

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Solution

The fourth proportional to 205,514.70, 308,041.65 and 105,636.30 is: 158,336.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,514.70 : 308,041.65 = 105,636.30 : x
  2. Step 2: Convert to fraction form
    205,514.70/308,041.65 = 105,636.30/x
  3. Step 3: Cross multiply
    205,514.70x = 308,041.65 × 105,636.30
  4. Step 4: Simplify right side
    205,514.70x = 32,540,380,151.90
  5. Step 5: Solve for x
    x = 32,540,380,151.90/205,514.70
  6. Step 6: Final answer
    x = 158,336.02

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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.