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Finding the Fourth Proportional to 200,086.87, 275,849.67 and 128,342.34

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Solution

The fourth proportional to 200,086.87, 275,849.67 and 128,342.34 is: 176,939.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,086.87 : 275,849.67 = 128,342.34 : x
  2. Step 2: Convert to fraction form
    200,086.87/275,849.67 = 128,342.34/x
  3. Step 3: Cross multiply
    200,086.87x = 275,849.67 × 128,342.34
  4. Step 4: Simplify right side
    200,086.87x = 35,403,192,136.03
  5. Step 5: Solve for x
    x = 35,403,192,136.03/200,086.87
  6. Step 6: Final answer
    x = 176,939.11

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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.