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Finding the Fourth Proportional to 64,821.92, 89,453.72 and 36,141.24

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Solution

The fourth proportional to 64,821.92, 89,453.72 and 36,141.24 is: 49,874.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,821.92 : 89,453.72 = 36,141.24 : x
  2. Step 2: Convert to fraction form
    64,821.92/89,453.72 = 36,141.24/x
  3. Step 3: Cross multiply
    64,821.92x = 89,453.72 × 36,141.24
  4. Step 4: Simplify right side
    64,821.92x = 3,232,968,363.41
  5. Step 5: Solve for x
    x = 3,232,968,363.41/64,821.92
  6. Step 6: Final answer
    x = 49,874.62

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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.