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Finding the Fourth Proportional to 136,626.40, 204,939.60 and 80,639.20

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Solution

The fourth proportional to 136,626.40, 204,939.60 and 80,639.20 is: 120,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,626.40 : 204,939.60 = 80,639.20 : x
  2. Step 2: Convert to fraction form
    136,626.40/204,939.60 = 80,639.20/x
  3. Step 3: Cross multiply
    136,626.40x = 204,939.60 × 80,639.20
  4. Step 4: Simplify right side
    136,626.40x = 16,526,165,392.32
  5. Step 5: Solve for x
    x = 16,526,165,392.32/136,626.40
  6. Step 6: Final answer
    x = 120,958.80

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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.