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Finding the Fourth Proportional to 73,571.73, 110,358.60 and 20,981.22

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Solution

The fourth proportional to 73,571.73, 110,358.60 and 20,981.22 is: 31,472.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,571.73 : 110,358.60 = 20,981.22 : x
  2. Step 2: Convert to fraction form
    73,571.73/110,358.60 = 20,981.22/x
  3. Step 3: Cross multiply
    73,571.73x = 110,358.60 × 20,981.22
  4. Step 4: Simplify right side
    73,571.73x = 2,315,457,513.70
  5. Step 5: Solve for x
    x = 2,315,457,513.70/73,571.73
  6. Step 6: Final answer
    x = 31,472.11

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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.