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Finding the Fourth Proportional to 57,781.01, 86,671.21 and 18,341.16

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Solution

The fourth proportional to 57,781.01, 86,671.21 and 18,341.16 is: 27,511.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,781.01 : 86,671.21 = 18,341.16 : x
  2. Step 2: Convert to fraction form
    57,781.01/86,671.21 = 18,341.16/x
  3. Step 3: Cross multiply
    57,781.01x = 86,671.21 × 18,341.16
  4. Step 4: Simplify right side
    57,781.01x = 1,589,650,530.00
  5. Step 5: Solve for x
    x = 1,589,650,530.00/57,781.01
  6. Step 6: Final answer
    x = 27,511.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.