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Finding the Fourth Proportional to 63,646.47, 87,832.62 and 39,787.20

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Solution

The fourth proportional to 63,646.47, 87,832.62 and 39,787.20 is: 54,906.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,646.47 : 87,832.62 = 39,787.20 : x
  2. Step 2: Convert to fraction form
    63,646.47/87,832.62 = 39,787.20/x
  3. Step 3: Cross multiply
    63,646.47x = 87,832.62 × 39,787.20
  4. Step 4: Simplify right side
    63,646.47x = 3,494,614,018.46
  5. Step 5: Solve for x
    x = 3,494,614,018.46/63,646.47
  6. Step 6: Final answer
    x = 54,906.64

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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.