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Finding the Fourth Proportional to 141,866.98, 195,777.79 and 78,207.05

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Solution

The fourth proportional to 141,866.98, 195,777.79 and 78,207.05 is: 107,926.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,866.98 : 195,777.79 = 78,207.05 : x
  2. Step 2: Convert to fraction form
    141,866.98/195,777.79 = 78,207.05/x
  3. Step 3: Cross multiply
    141,866.98x = 195,777.79 × 78,207.05
  4. Step 4: Simplify right side
    141,866.98x = 15,311,203,705.35
  5. Step 5: Solve for x
    x = 15,311,203,705.35/141,866.98
  6. Step 6: Final answer
    x = 107,926.48

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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.