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Finding the Fourth Proportional to 120,999.50, 166,983.36 and 66,553.97

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Solution

The fourth proportional to 120,999.50, 166,983.36 and 66,553.97 is: 91,846.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,999.50 : 166,983.36 = 66,553.97 : x
  2. Step 2: Convert to fraction form
    120,999.50/166,983.36 = 66,553.97/x
  3. Step 3: Cross multiply
    120,999.50x = 166,983.36 × 66,553.97
  4. Step 4: Simplify right side
    120,999.50x = 11,113,404,963.04
  5. Step 5: Solve for x
    x = 11,113,404,963.04/120,999.50
  6. Step 6: Final answer
    x = 91,846.70

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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.