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Finding the Fourth Proportional to 64,783.57, 89,400.11 and 36,102.60

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Solution

The fourth proportional to 64,783.57, 89,400.11 and 36,102.60 is: 49,820.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,783.57 : 89,400.11 = 36,102.60 : x
  2. Step 2: Convert to fraction form
    64,783.57/89,400.11 = 36,102.60/x
  3. Step 3: Cross multiply
    64,783.57x = 89,400.11 × 36,102.60
  4. Step 4: Simplify right side
    64,783.57x = 3,227,576,411.29
  5. Step 5: Solve for x
    x = 3,227,576,411.29/64,783.57
  6. Step 6: Final answer
    x = 49,820.91

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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.