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Finding the Fourth Proportional to 67,878.68, 101,832.66 and 20,489.83

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Solution

The fourth proportional to 67,878.68, 101,832.66 and 20,489.83 is: 30,739.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,878.68 : 101,832.66 = 20,489.83 : x
  2. Step 2: Convert to fraction form
    67,878.68/101,832.66 = 20,489.83/x
  3. Step 3: Cross multiply
    67,878.68x = 101,832.66 × 20,489.83
  4. Step 4: Simplify right side
    67,878.68x = 2,086,533,637.27
  5. Step 5: Solve for x
    x = 2,086,533,637.27/67,878.68
  6. Step 6: Final answer
    x = 30,739.16

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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.