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Finding the Fourth Proportional to 135,928.68, 204,017.55 and 72,820.05

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Solution

The fourth proportional to 135,928.68, 204,017.55 and 72,820.05 is: 109,296.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,928.68 : 204,017.55 = 72,820.05 : x
  2. Step 2: Convert to fraction form
    135,928.68/204,017.55 = 72,820.05/x
  3. Step 3: Cross multiply
    135,928.68x = 204,017.55 × 72,820.05
  4. Step 4: Simplify right side
    135,928.68x = 14,856,568,191.88
  5. Step 5: Solve for x
    x = 14,856,568,191.88/135,928.68
  6. Step 6: Final answer
    x = 109,296.79

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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.