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Finding the Fourth Proportional to 121,777.26, 182,665.92 and 79,692.78

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Solution

The fourth proportional to 121,777.26, 182,665.92 and 79,692.78 is: 119,539.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,777.26 : 182,665.92 = 79,692.78 : x
  2. Step 2: Convert to fraction form
    121,777.26/182,665.92 = 79,692.78/x
  3. Step 3: Cross multiply
    121,777.26x = 182,665.92 × 79,692.78
  4. Step 4: Simplify right side
    121,777.26x = 14,557,154,976.06
  5. Step 5: Solve for x
    x = 14,557,154,976.06/121,777.26
  6. Step 6: Final answer
    x = 119,539.19

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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.