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Finding the Fourth Proportional to 81,960.84, 122,837.58 and 39,850.56

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Solution

The fourth proportional to 81,960.84, 122,837.58 and 39,850.56 is: 59,725.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,960.84 : 122,837.58 = 39,850.56 : x
  2. Step 2: Convert to fraction form
    81,960.84/122,837.58 = 39,850.56/x
  3. Step 3: Cross multiply
    81,960.84x = 122,837.58 × 39,850.56
  4. Step 4: Simplify right side
    81,960.84x = 4,895,146,352.04
  5. Step 5: Solve for x
    x = 4,895,146,352.04/81,960.84
  6. Step 6: Final answer
    x = 59,725.43

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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.