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Finding the Fourth Proportional to 133,515.20, 200,272.80 and 128,849.60

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Solution

The fourth proportional to 133,515.20, 200,272.80 and 128,849.60 is: 193,274.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,515.20 : 200,272.80 = 128,849.60 : x
  2. Step 2: Convert to fraction form
    133,515.20/200,272.80 = 128,849.60/x
  3. Step 3: Cross multiply
    133,515.20x = 200,272.80 × 128,849.60
  4. Step 4: Simplify right side
    133,515.20x = 25,805,070,170.88
  5. Step 5: Solve for x
    x = 25,805,070,170.88/133,515.20
  6. Step 6: Final answer
    x = 193,274.40

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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.