Home / 129,511.12-194,179.20-66,175.60

Finding the Fourth Proportional to 129,511.12, 194,179.20 and 66,175.60

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Solution

The fourth proportional to 129,511.12, 194,179.20 and 66,175.60 is: 99,218.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,511.12 : 194,179.20 = 66,175.60 : x
  2. Step 2: Convert to fraction form
    129,511.12/194,179.20 = 66,175.60/x
  3. Step 3: Cross multiply
    129,511.12x = 194,179.20 × 66,175.60
  4. Step 4: Simplify right side
    129,511.12x = 12,849,925,067.52
  5. Step 5: Solve for x
    x = 12,849,925,067.52/129,511.12
  6. Step 6: Final answer
    x = 99,218.70

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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.