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Finding the Fourth Proportional to 57,408.75, 86,117.99 and 15,855.75

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Solution

The fourth proportional to 57,408.75, 86,117.99 and 15,855.75 is: 23,784.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,408.75 : 86,117.99 = 15,855.75 : x
  2. Step 2: Convert to fraction form
    57,408.75/86,117.99 = 15,855.75/x
  3. Step 3: Cross multiply
    57,408.75x = 86,117.99 × 15,855.75
  4. Step 4: Simplify right side
    57,408.75x = 1,365,465,240.66
  5. Step 5: Solve for x
    x = 1,365,465,240.66/57,408.75
  6. Step 6: Final answer
    x = 23,784.97

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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.