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Finding the Fourth Proportional to 205,853.40, 308,808.90 and 87,523.80

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Solution

The fourth proportional to 205,853.40, 308,808.90 and 87,523.80 is: 131,297.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,853.40 : 308,808.90 = 87,523.80 : x
  2. Step 2: Convert to fraction form
    205,853.40/308,808.90 = 87,523.80/x
  3. Step 3: Cross multiply
    205,853.40x = 308,808.90 × 87,523.80
  4. Step 4: Simplify right side
    205,853.40x = 27,028,128,401.82
  5. Step 5: Solve for x
    x = 27,028,128,401.82/205,853.40
  6. Step 6: Final answer
    x = 131,297.95

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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.