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Finding the Fourth Proportional to 147,758.63, 203,906.90 and 80,690.63

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Solution

The fourth proportional to 147,758.63, 203,906.90 and 80,690.63 is: 111,353.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,758.63 : 203,906.90 = 80,690.63 : x
  2. Step 2: Convert to fraction form
    147,758.63/203,906.90 = 80,690.63/x
  3. Step 3: Cross multiply
    147,758.63x = 203,906.90 × 80,690.63
  4. Step 4: Simplify right side
    147,758.63x = 16,453,375,404.54
  5. Step 5: Solve for x
    x = 16,453,375,404.54/147,758.63
  6. Step 6: Final answer
    x = 111,353.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.