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Finding the Fourth Proportional to 57,479, 86,218.40 and 18,039.14

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Solution

The fourth proportional to 57,479, 86,218.40 and 18,039.14 is: 27,058.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,479 : 86,218.40 = 18,039.14 : x
  2. Step 2: Convert to fraction form
    57,479/86,218.40 = 18,039.14/x
  3. Step 3: Cross multiply
    57,479x = 86,218.40 × 18,039.14
  4. Step 4: Simplify right side
    57,479x = 1,555,305,788.18
  5. Step 5: Solve for x
    x = 1,555,305,788.18/57,479
  6. Step 6: Final answer
    x = 27,058.68

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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.