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Finding the Fourth Proportional to 67,121.80, 92,620.86 and 38,821.96

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Solution

The fourth proportional to 67,121.80, 92,620.86 and 38,821.96 is: 53,570.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,121.80 : 92,620.86 = 38,821.96 : x
  2. Step 2: Convert to fraction form
    67,121.80/92,620.86 = 38,821.96/x
  3. Step 3: Cross multiply
    67,121.80x = 92,620.86 × 38,821.96
  4. Step 4: Simplify right side
    67,121.80x = 3,595,723,322.09
  5. Step 5: Solve for x
    x = 3,595,723,322.09/67,121.80
  6. Step 6: Final answer
    x = 53,570.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.