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Finding the Fourth Proportional to 166,107.70, 248,991.45 and 81,738.10

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Solution

The fourth proportional to 166,107.70, 248,991.45 and 81,738.10 is: 122,523.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,107.70 : 248,991.45 = 81,738.10 : x
  2. Step 2: Convert to fraction form
    166,107.70/248,991.45 = 81,738.10/x
  3. Step 3: Cross multiply
    166,107.70x = 248,991.45 × 81,738.10
  4. Step 4: Simplify right side
    166,107.70x = 20,352,088,039.25
  5. Step 5: Solve for x
    x = 20,352,088,039.25/166,107.70
  6. Step 6: Final answer
    x = 122,523.45

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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.