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Finding the Fourth Proportional to 74,571.86, 111,861.30 and 21,981.80

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Solution

The fourth proportional to 74,571.86, 111,861.30 and 21,981.80 is: 32,973.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,571.86 : 111,861.30 = 21,981.80 : x
  2. Step 2: Convert to fraction form
    74,571.86/111,861.30 = 21,981.80/x
  3. Step 3: Cross multiply
    74,571.86x = 111,861.30 × 21,981.80
  4. Step 4: Simplify right side
    74,571.86x = 2,458,912,724.34
  5. Step 5: Solve for x
    x = 2,458,912,724.34/74,571.86
  6. Step 6: Final answer
    x = 32,973.73

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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.