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Finding the Fourth Proportional to 127,860.89, 191,856.11 and 85,195.48

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Solution

The fourth proportional to 127,860.89, 191,856.11 and 85,195.48 is: 127,836.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,860.89 : 191,856.11 = 85,195.48 : x
  2. Step 2: Convert to fraction form
    127,860.89/191,856.11 = 85,195.48/x
  3. Step 3: Cross multiply
    127,860.89x = 191,856.11 × 85,195.48
  4. Step 4: Simplify right side
    127,860.89x = 16,345,272,476.77
  5. Step 5: Solve for x
    x = 16,345,272,476.77/127,860.89
  6. Step 6: Final answer
    x = 127,836.37

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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.