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Finding the Fourth Proportional to 87,617.76, 120,912.39 and 49,892.01

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Solution

The fourth proportional to 87,617.76, 120,912.39 and 49,892.01 is: 68,850.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,617.76 : 120,912.39 = 49,892.01 : x
  2. Step 2: Convert to fraction form
    87,617.76/120,912.39 = 49,892.01/x
  3. Step 3: Cross multiply
    87,617.76x = 120,912.39 × 49,892.01
  4. Step 4: Simplify right side
    87,617.76x = 6,032,562,171.00
  5. Step 5: Solve for x
    x = 6,032,562,171.00/87,617.76
  6. Step 6: Final answer
    x = 68,850.91

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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.