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Finding the Fourth Proportional to 67,220.91, 100,863.99 and 42,272.70

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Solution

The fourth proportional to 67,220.91, 100,863.99 and 42,272.70 is: 63,429.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,220.91 : 100,863.99 = 42,272.70 : x
  2. Step 2: Convert to fraction form
    67,220.91/100,863.99 = 42,272.70/x
  3. Step 3: Cross multiply
    67,220.91x = 100,863.99 × 42,272.70
  4. Step 4: Simplify right side
    67,220.91x = 4,263,793,190.07
  5. Step 5: Solve for x
    x = 4,263,793,190.07/67,220.91
  6. Step 6: Final answer
    x = 63,429.57

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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.