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Finding the Fourth Proportional to 57,531.87, 86,308.74 and 18,078.39

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Solution

The fourth proportional to 57,531.87, 86,308.74 and 18,078.39 is: 27,121.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,531.87 : 86,308.74 = 18,078.39 : x
  2. Step 2: Convert to fraction form
    57,531.87/86,308.74 = 18,078.39/x
  3. Step 3: Cross multiply
    57,531.87x = 86,308.74 × 18,078.39
  4. Step 4: Simplify right side
    57,531.87x = 1,560,323,062.13
  5. Step 5: Solve for x
    x = 1,560,323,062.13/57,531.87
  6. Step 6: Final answer
    x = 27,121.02

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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.