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Finding the Fourth Proportional to 79,338.56, 109,471.92 and 51,040.40

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Solution

The fourth proportional to 79,338.56, 109,471.92 and 51,040.40 is: 70,425.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,338.56 : 109,471.92 = 51,040.40 : x
  2. Step 2: Convert to fraction form
    79,338.56/109,471.92 = 51,040.40/x
  3. Step 3: Cross multiply
    79,338.56x = 109,471.92 × 51,040.40
  4. Step 4: Simplify right side
    79,338.56x = 5,587,490,585.57
  5. Step 5: Solve for x
    x = 5,587,490,585.57/79,338.56
  6. Step 6: Final answer
    x = 70,425.91

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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.