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Finding the Fourth Proportional to 63,728.14, 87,947.09 and 36,509.09

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Solution

The fourth proportional to 63,728.14, 87,947.09 and 36,509.09 is: 50,383.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,728.14 : 87,947.09 = 36,509.09 : x
  2. Step 2: Convert to fraction form
    63,728.14/87,947.09 = 36,509.09/x
  3. Step 3: Cross multiply
    63,728.14x = 87,947.09 × 36,509.09
  4. Step 4: Simplify right side
    63,728.14x = 3,210,868,224.05
  5. Step 5: Solve for x
    x = 3,210,868,224.05/63,728.14
  6. Step 6: Final answer
    x = 50,383.84

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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.