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Finding the Fourth Proportional to 141,999.88, 195,958.74 and 78,340.36

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Solution

The fourth proportional to 141,999.88, 195,958.74 and 78,340.36 is: 108,109.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,999.88 : 195,958.74 = 78,340.36 : x
  2. Step 2: Convert to fraction form
    141,999.88/195,958.74 = 78,340.36/x
  3. Step 3: Cross multiply
    141,999.88x = 195,958.74 × 78,340.36
  4. Step 4: Simplify right side
    141,999.88x = 15,351,478,236.75
  5. Step 5: Solve for x
    x = 15,351,478,236.75/141,999.88
  6. Step 6: Final answer
    x = 108,109.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.