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Finding the Fourth Proportional to 78,863.93, 108,815.60 and 50,173.22

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Solution

The fourth proportional to 78,863.93, 108,815.60 and 50,173.22 is: 69,228.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,863.93 : 108,815.60 = 50,173.22 : x
  2. Step 2: Convert to fraction form
    78,863.93/108,815.60 = 50,173.22/x
  3. Step 3: Cross multiply
    78,863.93x = 108,815.60 × 50,173.22
  4. Step 4: Simplify right side
    78,863.93x = 5,459,629,435.70
  5. Step 5: Solve for x
    x = 5,459,629,435.70/78,863.93
  6. Step 6: Final answer
    x = 69,228.47

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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.