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Finding the Fourth Proportional to 70,679.78, 105,940.66 and 30,652.55

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Solution

The fourth proportional to 70,679.78, 105,940.66 and 30,652.55 is: 45,944.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,679.78 : 105,940.66 = 30,652.55 : x
  2. Step 2: Convert to fraction form
    70,679.78/105,940.66 = 30,652.55/x
  3. Step 3: Cross multiply
    70,679.78x = 105,940.66 × 30,652.55
  4. Step 4: Simplify right side
    70,679.78x = 3,247,351,377.68
  5. Step 5: Solve for x
    x = 3,247,351,377.68/70,679.78
  6. Step 6: Final answer
    x = 45,944.56

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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.