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Finding the Fourth Proportional to 67,954.86, 101,912.85 and 21,195.18

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Solution

The fourth proportional to 67,954.86, 101,912.85 and 21,195.18 is: 31,786.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,954.86 : 101,912.85 = 21,195.18 : x
  2. Step 2: Convert to fraction form
    67,954.86/101,912.85 = 21,195.18/x
  3. Step 3: Cross multiply
    67,954.86x = 101,912.85 × 21,195.18
  4. Step 4: Simplify right side
    67,954.86x = 2,160,061,200.06
  5. Step 5: Solve for x
    x = 2,160,061,200.06/67,954.86
  6. Step 6: Final answer
    x = 31,786.71

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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.