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Finding the Fourth Proportional to 63,676.78, 87,874.49 and 39,817.29

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Solution

The fourth proportional to 63,676.78, 87,874.49 and 39,817.29 is: 54,948.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,676.78 : 87,874.49 = 39,817.29 : x
  2. Step 2: Convert to fraction form
    63,676.78/87,874.49 = 39,817.29/x
  3. Step 3: Cross multiply
    63,676.78x = 87,874.49 × 39,817.29
  4. Step 4: Simplify right side
    63,676.78x = 3,498,924,051.93
  5. Step 5: Solve for x
    x = 3,498,924,051.93/63,676.78
  6. Step 6: Final answer
    x = 54,948.19

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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.