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Finding the Fourth Proportional to 278,173.80, 417,243.42 and 88,629.48

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Solution

The fourth proportional to 278,173.80, 417,243.42 and 88,629.48 is: 132,938.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,173.80 : 417,243.42 = 88,629.48 : x
  2. Step 2: Convert to fraction form
    278,173.80/417,243.42 = 88,629.48/x
  3. Step 3: Cross multiply
    278,173.80x = 417,243.42 × 88,629.48
  4. Step 4: Simplify right side
    278,173.80x = 36,980,067,348.02
  5. Step 5: Solve for x
    x = 36,980,067,348.02/278,173.80
  6. Step 6: Final answer
    x = 132,938.71

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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.