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Finding the Fourth Proportional to 67,878.42, 101,832.24 and 20,489.55

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Solution

The fourth proportional to 67,878.42, 101,832.24 and 20,489.55 is: 30,738.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,878.42 : 101,832.24 = 20,489.55 : x
  2. Step 2: Convert to fraction form
    67,878.42/101,832.24 = 20,489.55/x
  3. Step 3: Cross multiply
    67,878.42x = 101,832.24 × 20,489.55
  4. Step 4: Simplify right side
    67,878.42x = 2,086,496,773.09
  5. Step 5: Solve for x
    x = 2,086,496,773.09/67,878.42
  6. Step 6: Final answer
    x = 30,738.74

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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.