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Finding the Fourth Proportional to 57,108, 85,662 and 15,555

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Solution

The fourth proportional to 57,108, 85,662 and 15,555 is: 23,332.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,108 : 85,662 = 15,555 : x
  2. Step 2: Convert to fraction form
    57,108/85,662 = 15,555/x
  3. Step 3: Cross multiply
    57,108x = 85,662 × 15,555
  4. Step 4: Simplify right side
    57,108x = 1,332,472,410
  5. Step 5: Solve for x
    x = 1,332,472,410/57,108
  6. Step 6: Final answer
    x = 23,332.50

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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.