Home / 129,760.20-194,640.30-128,531.40

Finding the Fourth Proportional to 129,760.20, 194,640.30 and 128,531.40

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Solution

The fourth proportional to 129,760.20, 194,640.30 and 128,531.40 is: 192,797.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,760.20 : 194,640.30 = 128,531.40 : x
  2. Step 2: Convert to fraction form
    129,760.20/194,640.30 = 128,531.40/x
  3. Step 3: Cross multiply
    129,760.20x = 194,640.30 × 128,531.40
  4. Step 4: Simplify right side
    129,760.20x = 25,017,390,255.42
  5. Step 5: Solve for x
    x = 25,017,390,255.42/129,760.20
  6. Step 6: Final answer
    x = 192,797.10

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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.