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Finding the Fourth Proportional to 71,040.75, 106,563.05 and 21,792.75

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Solution

The fourth proportional to 71,040.75, 106,563.05 and 21,792.75 is: 32,689.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,040.75 : 106,563.05 = 21,792.75 : x
  2. Step 2: Convert to fraction form
    71,040.75/106,563.05 = 21,792.75/x
  3. Step 3: Cross multiply
    71,040.75x = 106,563.05 × 21,792.75
  4. Step 4: Simplify right side
    71,040.75x = 2,322,301,798.92
  5. Step 5: Solve for x
    x = 2,322,301,798.92/71,040.75
  6. Step 6: Final answer
    x = 32,689.71

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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.