Home / 215,819.90-323,729.85-131,839.10

Finding the Fourth Proportional to 215,819.90, 323,729.85 and 131,839.10

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Solution

The fourth proportional to 215,819.90, 323,729.85 and 131,839.10 is: 197,758.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,819.90 : 323,729.85 = 131,839.10 : x
  2. Step 2: Convert to fraction form
    215,819.90/323,729.85 = 131,839.10/x
  3. Step 3: Cross multiply
    215,819.90x = 323,729.85 × 131,839.10
  4. Step 4: Simplify right side
    215,819.90x = 42,680,252,067.14
  5. Step 5: Solve for x
    x = 42,680,252,067.14/215,819.90
  6. Step 6: Final answer
    x = 197,758.65

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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.