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Finding the Fourth Proportional to 72,580.73, 108,843.10 and 28,201.64

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Solution

The fourth proportional to 72,580.73, 108,843.10 and 28,201.64 is: 42,291.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,580.73 : 108,843.10 = 28,201.64 : x
  2. Step 2: Convert to fraction form
    72,580.73/108,843.10 = 28,201.64/x
  3. Step 3: Cross multiply
    72,580.73x = 108,843.10 × 28,201.64
  4. Step 4: Simplify right side
    72,580.73x = 3,069,553,922.68
  5. Step 5: Solve for x
    x = 3,069,553,922.68/72,580.73
  6. Step 6: Final answer
    x = 42,291.58

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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.