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Finding the Fourth Proportional to 106,395.70, 159,485.86 and 68,979.54

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Solution

The fourth proportional to 106,395.70, 159,485.86 and 68,979.54 is: 103,399.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,395.70 : 159,485.86 = 68,979.54 : x
  2. Step 2: Convert to fraction form
    106,395.70/159,485.86 = 68,979.54/x
  3. Step 3: Cross multiply
    106,395.70x = 159,485.86 × 68,979.54
  4. Step 4: Simplify right side
    106,395.70x = 11,001,261,259.30
  5. Step 5: Solve for x
    x = 11,001,261,259.30/106,395.70
  6. Step 6: Final answer
    x = 103,399.49

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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.