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Finding the Fourth Proportional to 129,999.99, 194,856.86 and 85,002.79

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Solution

The fourth proportional to 129,999.99, 194,856.86 and 85,002.79 is: 127,410.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,999.99 : 194,856.86 = 85,002.79 : x
  2. Step 2: Convert to fraction form
    129,999.99/194,856.86 = 85,002.79/x
  3. Step 3: Cross multiply
    129,999.99x = 194,856.86 × 85,002.79
  4. Step 4: Simplify right side
    129,999.99x = 16,563,376,750.64
  5. Step 5: Solve for x
    x = 16,563,376,750.64/129,999.99
  6. Step 6: Final answer
    x = 127,410.61

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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.