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Finding the Fourth Proportional to 70,419.65, 105,558.39 and 44,142.84

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Solution

The fourth proportional to 70,419.65, 105,558.39 and 44,142.84 is: 66,169.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,419.65 : 105,558.39 = 44,142.84 : x
  2. Step 2: Convert to fraction form
    70,419.65/105,558.39 = 44,142.84/x
  3. Step 3: Cross multiply
    70,419.65x = 105,558.39 × 44,142.84
  4. Step 4: Simplify right side
    70,419.65x = 4,659,647,120.43
  5. Step 5: Solve for x
    x = 4,659,647,120.43/70,419.65
  6. Step 6: Final answer
    x = 66,169.70

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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.