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Finding the Fourth Proportional to 68,633.60, 102,493.64 and 67,891.39

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Solution

The fourth proportional to 68,633.60, 102,493.64 and 67,891.39 is: 101,385.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,633.60 : 102,493.64 = 67,891.39 : x
  2. Step 2: Convert to fraction form
    68,633.60/102,493.64 = 67,891.39/x
  3. Step 3: Cross multiply
    68,633.60x = 102,493.64 × 67,891.39
  4. Step 4: Simplify right side
    68,633.60x = 6,958,435,599.25
  5. Step 5: Solve for x
    x = 6,958,435,599.25/68,633.60
  6. Step 6: Final answer
    x = 101,385.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.