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Finding the Fourth Proportional to 108,787.92, 163,183.32 and 42,231.84

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Solution

The fourth proportional to 108,787.92, 163,183.32 and 42,231.84 is: 63,348.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,787.92 : 163,183.32 = 42,231.84 : x
  2. Step 2: Convert to fraction form
    108,787.92/163,183.32 = 42,231.84/x
  3. Step 3: Cross multiply
    108,787.92x = 163,183.32 × 42,231.84
  4. Step 4: Simplify right side
    108,787.92x = 6,891,531,860.91
  5. Step 5: Solve for x
    x = 6,891,531,860.91/108,787.92
  6. Step 6: Final answer
    x = 63,348.32

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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.