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Finding the Fourth Proportional to 127,901.70, 192,025.35 and 81,245.70

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Solution

The fourth proportional to 127,901.70, 192,025.35 and 81,245.70 is: 121,978.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,901.70 : 192,025.35 = 81,245.70 : x
  2. Step 2: Convert to fraction form
    127,901.70/192,025.35 = 81,245.70/x
  3. Step 3: Cross multiply
    127,901.70x = 192,025.35 × 81,245.70
  4. Step 4: Simplify right side
    127,901.70x = 15,601,233,978.50
  5. Step 5: Solve for x
    x = 15,601,233,978.50/127,901.70
  6. Step 6: Final answer
    x = 121,978.32

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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.