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Finding the Fourth Proportional to 113,761.20, 170,771.40 and 67,040.40

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Solution

The fourth proportional to 113,761.20, 170,771.40 and 67,040.40 is: 100,636.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,761.20 : 170,771.40 = 67,040.40 : x
  2. Step 2: Convert to fraction form
    113,761.20/170,771.40 = 67,040.40/x
  3. Step 3: Cross multiply
    113,761.20x = 170,771.40 × 67,040.40
  4. Step 4: Simplify right side
    113,761.20x = 11,448,582,964.56
  5. Step 5: Solve for x
    x = 11,448,582,964.56/113,761.20
  6. Step 6: Final answer
    x = 100,636.97

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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.