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Finding the Fourth Proportional to 70,662.80, 105,799.80 and 67,163.60

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Solution

The fourth proportional to 70,662.80, 105,799.80 and 67,163.60 is: 100,560.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,662.80 : 105,799.80 = 67,163.60 : x
  2. Step 2: Convert to fraction form
    70,662.80/105,799.80 = 67,163.60/x
  3. Step 3: Cross multiply
    70,662.80x = 105,799.80 × 67,163.60
  4. Step 4: Simplify right side
    70,662.80x = 7,105,895,447.28
  5. Step 5: Solve for x
    x = 7,105,895,447.28/70,662.80
  6. Step 6: Final answer
    x = 100,560.63

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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.