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Finding the Fourth Proportional to 505,115.80, 757,673.70 and 131,138.80

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Solution

The fourth proportional to 505,115.80, 757,673.70 and 131,138.80 is: 196,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,115.80 : 757,673.70 = 131,138.80 : x
  2. Step 2: Convert to fraction form
    505,115.80/757,673.70 = 131,138.80/x
  3. Step 3: Cross multiply
    505,115.80x = 757,673.70 × 131,138.80
  4. Step 4: Simplify right side
    505,115.80x = 99,360,419,809.56
  5. Step 5: Solve for x
    x = 99,360,419,809.56/505,115.80
  6. Step 6: Final answer
    x = 196,708.20

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Similar ratio
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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.