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Finding the Fourth Proportional to 136,441.80, 204,784.20 and 80,211.60

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Solution

The fourth proportional to 136,441.80, 204,784.20 and 80,211.60 is: 120,388.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,441.80 : 204,784.20 = 80,211.60 : x
  2. Step 2: Convert to fraction form
    136,441.80/204,784.20 = 80,211.60/x
  3. Step 3: Cross multiply
    136,441.80x = 204,784.20 × 80,211.60
  4. Step 4: Simplify right side
    136,441.80x = 16,426,068,336.72
  5. Step 5: Solve for x
    x = 16,426,068,336.72/136,441.80
  6. Step 6: Final answer
    x = 120,388.83

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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.