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Finding the Fourth Proportional to 57,486.40, 86,229.44 and 18,043.68

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Solution

The fourth proportional to 57,486.40, 86,229.44 and 18,043.68 is: 27,065.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,486.40 : 86,229.44 = 18,043.68 : x
  2. Step 2: Convert to fraction form
    57,486.40/86,229.44 = 18,043.68/x
  3. Step 3: Cross multiply
    57,486.40x = 86,229.44 × 18,043.68
  4. Step 4: Simplify right side
    57,486.40x = 1,555,896,421.94
  5. Step 5: Solve for x
    x = 1,555,896,421.94/57,486.40
  6. Step 6: Final answer
    x = 27,065.47

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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.