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Finding the Fourth Proportional to 194,249.80, 291,201.90 and 127,721.80

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Solution

The fourth proportional to 194,249.80, 291,201.90 and 127,721.80 is: 191,469.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,249.80 : 291,201.90 = 127,721.80 : x
  2. Step 2: Convert to fraction form
    194,249.80/291,201.90 = 127,721.80/x
  3. Step 3: Cross multiply
    194,249.80x = 291,201.90 × 127,721.80
  4. Step 4: Simplify right side
    194,249.80x = 37,192,830,831.42
  5. Step 5: Solve for x
    x = 37,192,830,831.42/194,249.80
  6. Step 6: Final answer
    x = 191,469.08

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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.