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Finding the Fourth Proportional to 113,761.70, 170,772.15 and 67,040.90

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Solution

The fourth proportional to 113,761.70, 170,772.15 and 67,040.90 is: 100,637.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,761.70 : 170,772.15 = 67,040.90 : x
  2. Step 2: Convert to fraction form
    113,761.70/170,772.15 = 67,040.90/x
  3. Step 3: Cross multiply
    113,761.70x = 170,772.15 × 67,040.90
  4. Step 4: Simplify right side
    113,761.70x = 11,448,718,630.94
  5. Step 5: Solve for x
    x = 11,448,718,630.94/113,761.70
  6. Step 6: Final answer
    x = 100,637.72

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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.