Home / 100,947.09-139,305.12-55,629.27

Finding the Fourth Proportional to 100,947.09, 139,305.12 and 55,629.27

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Solution

The fourth proportional to 100,947.09, 139,305.12 and 55,629.27 is: 76,767.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,947.09 : 139,305.12 = 55,629.27 : x
  2. Step 2: Convert to fraction form
    100,947.09/139,305.12 = 55,629.27/x
  3. Step 3: Cross multiply
    100,947.09x = 139,305.12 × 55,629.27
  4. Step 4: Simplify right side
    100,947.09x = 7,749,442,132.86
  5. Step 5: Solve for x
    x = 7,749,442,132.86/100,947.09
  6. Step 6: Final answer
    x = 76,767.37

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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.