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Finding the Fourth Proportional to 127,858.70, 191,852.83 and 85,193.29

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Solution

The fourth proportional to 127,858.70, 191,852.83 and 85,193.29 is: 127,833.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,858.70 : 191,852.83 = 85,193.29 : x
  2. Step 2: Convert to fraction form
    127,858.70/191,852.83 = 85,193.29/x
  3. Step 3: Cross multiply
    127,858.70x = 191,852.83 × 85,193.29
  4. Step 4: Simplify right side
    127,858.70x = 16,344,573,783.51
  5. Step 5: Solve for x
    x = 16,344,573,783.51/127,858.70
  6. Step 6: Final answer
    x = 127,833.10

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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.