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Finding the Fourth Proportional to 72,568.98, 108,825.48 and 28,189.89

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Solution

The fourth proportional to 72,568.98, 108,825.48 and 28,189.89 is: 42,273.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,568.98 : 108,825.48 = 28,189.89 : x
  2. Step 2: Convert to fraction form
    72,568.98/108,825.48 = 28,189.89/x
  3. Step 3: Cross multiply
    72,568.98x = 108,825.48 × 28,189.89
  4. Step 4: Simplify right side
    72,568.98x = 3,067,778,310.40
  5. Step 5: Solve for x
    x = 3,067,778,310.40/72,568.98
  6. Step 6: Final answer
    x = 42,273.96

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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.