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Finding the Fourth Proportional to 68,741.60, 103,112.40 and 51,245.60

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Solution

The fourth proportional to 68,741.60, 103,112.40 and 51,245.60 is: 76,868.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,741.60 : 103,112.40 = 51,245.60 : x
  2. Step 2: Convert to fraction form
    68,741.60/103,112.40 = 51,245.60/x
  3. Step 3: Cross multiply
    68,741.60x = 103,112.40 × 51,245.60
  4. Step 4: Simplify right side
    68,741.60x = 5,284,056,805.44
  5. Step 5: Solve for x
    x = 5,284,056,805.44/68,741.60
  6. Step 6: Final answer
    x = 76,868.40

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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.