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Finding the Fourth Proportional to 133,478.20, 200,217.30 and 128,812.60

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Solution

The fourth proportional to 133,478.20, 200,217.30 and 128,812.60 is: 193,218.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,478.20 : 200,217.30 = 128,812.60 : x
  2. Step 2: Convert to fraction form
    133,478.20/200,217.30 = 128,812.60/x
  3. Step 3: Cross multiply
    133,478.20x = 200,217.30 × 128,812.60
  4. Step 4: Simplify right side
    133,478.20x = 25,790,510,977.98
  5. Step 5: Solve for x
    x = 25,790,510,977.98/133,478.20
  6. Step 6: Final answer
    x = 193,218.90

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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.