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Finding the Fourth Proportional to 100,858.44, 139,183.46 and 55,535.48

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Solution

The fourth proportional to 100,858.44, 139,183.46 and 55,535.48 is: 76,638.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,858.44 : 139,183.46 = 55,535.48 : x
  2. Step 2: Convert to fraction form
    100,858.44/139,183.46 = 55,535.48/x
  3. Step 3: Cross multiply
    100,858.44x = 139,183.46 × 55,535.48
  4. Step 4: Simplify right side
    100,858.44x = 7,729,620,259.16
  5. Step 5: Solve for x
    x = 7,729,620,259.16/100,858.44
  6. Step 6: Final answer
    x = 76,638.31

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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.