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Finding the Fourth Proportional to 108,786.35, 163,187.43 and 45,542.87

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Solution

The fourth proportional to 108,786.35, 163,187.43 and 45,542.87 is: 68,317.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,786.35 : 163,187.43 = 45,542.87 : x
  2. Step 2: Convert to fraction form
    108,786.35/163,187.43 = 45,542.87/x
  3. Step 3: Cross multiply
    108,786.35x = 163,187.43 × 45,542.87
  4. Step 4: Simplify right side
    108,786.35x = 7,432,023,910.12
  5. Step 5: Solve for x
    x = 7,432,023,910.12/108,786.35
  6. Step 6: Final answer
    x = 68,317.61

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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.