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Finding the Fourth Proportional to 168,761.40, 253,142.34 and 68,921.60

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Solution

The fourth proportional to 168,761.40, 253,142.34 and 68,921.60 is: 103,382.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,761.40 : 253,142.34 = 68,921.60 : x
  2. Step 2: Convert to fraction form
    168,761.40/253,142.34 = 68,921.60/x
  3. Step 3: Cross multiply
    168,761.40x = 253,142.34 × 68,921.60
  4. Step 4: Simplify right side
    168,761.40x = 17,446,975,100.54
  5. Step 5: Solve for x
    x = 17,446,975,100.54/168,761.40
  6. Step 6: Final answer
    x = 103,382.50

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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.