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Finding the Fourth Proportional to 128,626.67, 193,005.81 and 61,234.88

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Solution

The fourth proportional to 128,626.67, 193,005.81 and 61,234.88 is: 91,883.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,626.67 : 193,005.81 = 61,234.88 : x
  2. Step 2: Convert to fraction form
    128,626.67/193,005.81 = 61,234.88/x
  3. Step 3: Cross multiply
    128,626.67x = 193,005.81 × 61,234.88
  4. Step 4: Simplify right side
    128,626.67x = 11,818,686,649.62
  5. Step 5: Solve for x
    x = 11,818,686,649.62/128,626.67
  6. Step 6: Final answer
    x = 91,883.64

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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.