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Finding the Fourth Proportional to 168,638.40, 253,249.20 and 89,906.40

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Solution

The fourth proportional to 168,638.40, 253,249.20 and 89,906.40 is: 135,015.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,638.40 : 253,249.20 = 89,906.40 : x
  2. Step 2: Convert to fraction form
    168,638.40/253,249.20 = 89,906.40/x
  3. Step 3: Cross multiply
    168,638.40x = 253,249.20 × 89,906.40
  4. Step 4: Simplify right side
    168,638.40x = 22,768,723,874.88
  5. Step 5: Solve for x
    x = 22,768,723,874.88/168,638.40
  6. Step 6: Final answer
    x = 135,015.06

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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.