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Finding the Fourth Proportional to 100,891.44, 139,228.92 and 55,568.52

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Solution

The fourth proportional to 100,891.44, 139,228.92 and 55,568.52 is: 76,683.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,891.44 : 139,228.92 = 55,568.52 : x
  2. Step 2: Convert to fraction form
    100,891.44/139,228.92 = 55,568.52/x
  3. Step 3: Cross multiply
    100,891.44x = 139,228.92 × 55,568.52
  4. Step 4: Simplify right side
    100,891.44x = 7,736,745,025.60
  5. Step 5: Solve for x
    x = 7,736,745,025.60/100,891.44
  6. Step 6: Final answer
    x = 76,683.86

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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.