Home / 128,511.60-192,671.40-66,226.80

Finding the Fourth Proportional to 128,511.60, 192,671.40 and 66,226.80

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Solution

The fourth proportional to 128,511.60, 192,671.40 and 66,226.80 is: 99,290.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,511.60 : 192,671.40 = 66,226.80 : x
  2. Step 2: Convert to fraction form
    128,511.60/192,671.40 = 66,226.80/x
  3. Step 3: Cross multiply
    128,511.60x = 192,671.40 × 66,226.80
  4. Step 4: Simplify right side
    128,511.60x = 12,760,010,273.52
  5. Step 5: Solve for x
    x = 12,760,010,273.52/128,511.60
  6. Step 6: Final answer
    x = 99,290.73

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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.