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Finding the Fourth Proportional to 67,221.91, 100,865.49 and 42,273.70

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Solution

The fourth proportional to 67,221.91, 100,865.49 and 42,273.70 is: 63,431.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,221.91 : 100,865.49 = 42,273.70 : x
  2. Step 2: Convert to fraction form
    67,221.91/100,865.49 = 42,273.70/x
  3. Step 3: Cross multiply
    67,221.91x = 100,865.49 × 42,273.70
  4. Step 4: Simplify right side
    67,221.91x = 4,263,957,464.61
  5. Step 5: Solve for x
    x = 4,263,957,464.61/67,221.91
  6. Step 6: Final answer
    x = 63,431.07

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1.5x scale

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.