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Finding the Fourth Proportional to 262,781.11, 394,106.05 and 85,338.91

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Solution

The fourth proportional to 262,781.11, 394,106.05 and 85,338.91 is: 127,987.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,781.11 : 394,106.05 = 85,338.91 : x
  2. Step 2: Convert to fraction form
    262,781.11/394,106.05 = 85,338.91/x
  3. Step 3: Cross multiply
    262,781.11x = 394,106.05 × 85,338.91
  4. Step 4: Simplify right side
    262,781.11x = 33,632,578,334.18
  5. Step 5: Solve for x
    x = 33,632,578,334.18/262,781.11
  6. Step 6: Final answer
    x = 127,987.05

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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.