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Finding the Fourth Proportional to 71,761.74, 107,634.15 and 19,175.28

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Solution

The fourth proportional to 71,761.74, 107,634.15 and 19,175.28 is: 28,760.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,761.74 : 107,634.15 = 19,175.28 : x
  2. Step 2: Convert to fraction form
    71,761.74/107,634.15 = 19,175.28/x
  3. Step 3: Cross multiply
    71,761.74x = 107,634.15 × 19,175.28
  4. Step 4: Simplify right side
    71,761.74x = 2,063,914,963.81
  5. Step 5: Solve for x
    x = 2,063,914,963.81/71,761.74
  6. Step 6: Final answer
    x = 28,760.66

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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.