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Finding the Fourth Proportional to 193,383.99, 266,904 and 121,786.47

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Solution

The fourth proportional to 193,383.99, 266,904 and 121,786.47 is: 168,086.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,383.99 : 266,904 = 121,786.47 : x
  2. Step 2: Convert to fraction form
    193,383.99/266,904 = 121,786.47/x
  3. Step 3: Cross multiply
    193,383.99x = 266,904 × 121,786.47
  4. Step 4: Simplify right side
    193,383.99x = 32,505,295,988.88
  5. Step 5: Solve for x
    x = 32,505,295,988.88/193,383.99
  6. Step 6: Final answer
    x = 168,086.80

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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.