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Finding the Fourth Proportional to 70,272.58, 105,239.97 and 40,195.64

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Solution

The fourth proportional to 70,272.58, 105,239.97 and 40,195.64 is: 60,196.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,272.58 : 105,239.97 = 40,195.64 : x
  2. Step 2: Convert to fraction form
    70,272.58/105,239.97 = 40,195.64/x
  3. Step 3: Cross multiply
    70,272.58x = 105,239.97 × 40,195.64
  4. Step 4: Simplify right side
    70,272.58x = 4,230,187,947.73
  5. Step 5: Solve for x
    x = 4,230,187,947.73/70,272.58
  6. Step 6: Final answer
    x = 60,196.85

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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.