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Finding the Fourth Proportional to 71,728.53, 98,944.92 and 43,040.57

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Solution

The fourth proportional to 71,728.53, 98,944.92 and 43,040.57 is: 59,371.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,728.53 : 98,944.92 = 43,040.57 : x
  2. Step 2: Convert to fraction form
    71,728.53/98,944.92 = 43,040.57/x
  3. Step 3: Cross multiply
    71,728.53x = 98,944.92 × 43,040.57
  4. Step 4: Simplify right side
    71,728.53x = 4,258,645,260.68
  5. Step 5: Solve for x
    x = 4,258,645,260.68/71,728.53
  6. Step 6: Final answer
    x = 59,371.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.