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Finding the Fourth Proportional to 108,469.80, 149,683.95 and 63,149.09

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Solution

The fourth proportional to 108,469.80, 149,683.95 and 63,149.09 is: 87,143.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,469.80 : 149,683.95 = 63,149.09 : x
  2. Step 2: Convert to fraction form
    108,469.80/149,683.95 = 63,149.09/x
  3. Step 3: Cross multiply
    108,469.80x = 149,683.95 × 63,149.09
  4. Step 4: Simplify right side
    108,469.80x = 9,452,404,481.69
  5. Step 5: Solve for x
    x = 9,452,404,481.69/108,469.80
  6. Step 6: Final answer
    x = 87,143.19

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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.