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Finding the Fourth Proportional to 60,579.18, 90,879.63 and 20,601.90

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Solution

The fourth proportional to 60,579.18, 90,879.63 and 20,601.90 is: 30,906.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,579.18 : 90,879.63 = 20,601.90 : x
  2. Step 2: Convert to fraction form
    60,579.18/90,879.63 = 20,601.90/x
  3. Step 3: Cross multiply
    60,579.18x = 90,879.63 × 20,601.90
  4. Step 4: Simplify right side
    60,579.18x = 1,872,293,049.30
  5. Step 5: Solve for x
    x = 1,872,293,049.30/60,579.18
  6. Step 6: Final answer
    x = 30,906.54

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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.