Home / 128,650.20-192,560.58-66,234.84

Finding the Fourth Proportional to 128,650.20, 192,560.58 and 66,234.84

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Solution

The fourth proportional to 128,650.20, 192,560.58 and 66,234.84 is: 99,138.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,650.20 : 192,560.58 = 66,234.84 : x
  2. Step 2: Convert to fraction form
    128,650.20/192,560.58 = 66,234.84/x
  3. Step 3: Cross multiply
    128,650.20x = 192,560.58 × 66,234.84
  4. Step 4: Simplify right side
    128,650.20x = 12,754,219,206.61
  5. Step 5: Solve for x
    x = 12,754,219,206.61/128,650.20
  6. Step 6: Final answer
    x = 99,138.74

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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.