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Finding the Fourth Proportional to 71,135.88, 98,153.31 and 42,843.39

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Solution

The fourth proportional to 71,135.88, 98,153.31 and 42,843.39 is: 59,115.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,135.88 : 98,153.31 = 42,843.39 : x
  2. Step 2: Convert to fraction form
    71,135.88/98,153.31 = 42,843.39/x
  3. Step 3: Cross multiply
    71,135.88x = 98,153.31 × 42,843.39
  4. Step 4: Simplify right side
    71,135.88x = 4,205,220,540.12
  5. Step 5: Solve for x
    x = 4,205,220,540.12/71,135.88
  6. Step 6: Final answer
    x = 59,115.32

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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.