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Finding the Fourth Proportional to 74,571.84, 111,861.28 and 21,981.84

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Solution

The fourth proportional to 74,571.84, 111,861.28 and 21,981.84 is: 32,973.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,571.84 : 111,861.28 = 21,981.84 : x
  2. Step 2: Convert to fraction form
    74,571.84/111,861.28 = 21,981.84/x
  3. Step 3: Cross multiply
    74,571.84x = 111,861.28 × 21,981.84
  4. Step 4: Simplify right side
    74,571.84x = 2,458,916,759.16
  5. Step 5: Solve for x
    x = 2,458,916,759.16/74,571.84
  6. Step 6: Final answer
    x = 32,973.80

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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.