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Finding the Fourth Proportional to 57,418.50, 86,129.36 and 15,865.50

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Solution

The fourth proportional to 57,418.50, 86,129.36 and 15,865.50 is: 23,798.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,418.50 : 86,129.36 = 15,865.50 : x
  2. Step 2: Convert to fraction form
    57,418.50/86,129.36 = 15,865.50/x
  3. Step 3: Cross multiply
    57,418.50x = 86,129.36 × 15,865.50
  4. Step 4: Simplify right side
    57,418.50x = 1,366,485,361.08
  5. Step 5: Solve for x
    x = 1,366,485,361.08/57,418.50
  6. Step 6: Final answer
    x = 23,798.69

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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.