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Finding the Fourth Proportional to 63,682.93, 87,855.17 and 39,768.09

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Solution

The fourth proportional to 63,682.93, 87,855.17 and 39,768.09 is: 54,862.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,682.93 : 87,855.17 = 39,768.09 : x
  2. Step 2: Convert to fraction form
    63,682.93/87,855.17 = 39,768.09/x
  3. Step 3: Cross multiply
    63,682.93x = 87,855.17 × 39,768.09
  4. Step 4: Simplify right side
    63,682.93x = 3,493,831,967.67
  5. Step 5: Solve for x
    x = 3,493,831,967.67/63,682.93
  6. Step 6: Final answer
    x = 54,862.93

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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.