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Finding the Fourth Proportional to 209,383.52, 288,926.79 and 123,335.76

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Solution

The fourth proportional to 209,383.52, 288,926.79 and 123,335.76 is: 170,190.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,383.52 : 288,926.79 = 123,335.76 : x
  2. Step 2: Convert to fraction form
    209,383.52/288,926.79 = 123,335.76/x
  3. Step 3: Cross multiply
    209,383.52x = 288,926.79 × 123,335.76
  4. Step 4: Simplify right side
    209,383.52x = 35,635,005,229.01
  5. Step 5: Solve for x
    x = 35,635,005,229.01/209,383.52
  6. Step 6: Final answer
    x = 170,190.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.