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Finding the Fourth Proportional to 81,787.40, 122,616.30 and 44,851.40

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Solution

The fourth proportional to 81,787.40, 122,616.30 and 44,851.40 is: 67,241.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,787.40 : 122,616.30 = 44,851.40 : x
  2. Step 2: Convert to fraction form
    81,787.40/122,616.30 = 44,851.40/x
  3. Step 3: Cross multiply
    81,787.40x = 122,616.30 × 44,851.40
  4. Step 4: Simplify right side
    81,787.40x = 5,499,512,717.82
  5. Step 5: Solve for x
    x = 5,499,512,717.82/81,787.40
  6. Step 6: Final answer
    x = 67,241.56

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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.