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Finding the Fourth Proportional to 60,391.75, 90,550.43 and 20,406.96

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Solution

The fourth proportional to 60,391.75, 90,550.43 and 20,406.96 is: 30,597.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,391.75 : 90,550.43 = 20,406.96 : x
  2. Step 2: Convert to fraction form
    60,391.75/90,550.43 = 20,406.96/x
  3. Step 3: Cross multiply
    60,391.75x = 90,550.43 × 20,406.96
  4. Step 4: Simplify right side
    60,391.75x = 1,847,858,964.58
  5. Step 5: Solve for x
    x = 1,847,858,964.58/60,391.75
  6. Step 6: Final answer
    x = 30,597.87

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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.