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Finding the Fourth Proportional to 101,993.05, 140,705.12 and 67,968.39

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Solution

The fourth proportional to 101,993.05, 140,705.12 and 67,968.39 is: 93,766.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,993.05 : 140,705.12 = 67,968.39 : x
  2. Step 2: Convert to fraction form
    101,993.05/140,705.12 = 67,968.39/x
  3. Step 3: Cross multiply
    101,993.05x = 140,705.12 × 67,968.39
  4. Step 4: Simplify right side
    101,993.05x = 9,563,500,641.08
  5. Step 5: Solve for x
    x = 9,563,500,641.08/101,993.05
  6. Step 6: Final answer
    x = 93,766.20

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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.