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Finding the Fourth Proportional to 64,812.96, 89,443.44 and 36,132.48

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Solution

The fourth proportional to 64,812.96, 89,443.44 and 36,132.48 is: 49,863.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,812.96 : 89,443.44 = 36,132.48 : x
  2. Step 2: Convert to fraction form
    64,812.96/89,443.44 = 36,132.48/x
  3. Step 3: Cross multiply
    64,812.96x = 89,443.44 × 36,132.48
  4. Step 4: Simplify right side
    64,812.96x = 3,231,813,306.93
  5. Step 5: Solve for x
    x = 3,231,813,306.93/64,812.96
  6. Step 6: Final answer
    x = 49,863.69

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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.