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Finding the Fourth Proportional to 505,114.80, 757,672.20 and 131,137.80

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Solution

The fourth proportional to 505,114.80, 757,672.20 and 131,137.80 is: 196,706.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,114.80 : 757,672.20 = 131,137.80 : x
  2. Step 2: Convert to fraction form
    505,114.80/757,672.20 = 131,137.80/x
  3. Step 3: Cross multiply
    505,114.80x = 757,672.20 × 131,137.80
  4. Step 4: Simplify right side
    505,114.80x = 99,359,465,429.16
  5. Step 5: Solve for x
    x = 99,359,465,429.16/505,114.80
  6. Step 6: Final answer
    x = 196,706.70

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Double scale
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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.