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Finding the Fourth Proportional to 203,157.60, 280,218.74 and 139,384.68

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Solution

The fourth proportional to 203,157.60, 280,218.74 and 139,384.68 is: 192,255.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,157.60 : 280,218.74 = 139,384.68 : x
  2. Step 2: Convert to fraction form
    203,157.60/280,218.74 = 139,384.68/x
  3. Step 3: Cross multiply
    203,157.60x = 280,218.74 × 139,384.68
  4. Step 4: Simplify right side
    203,157.60x = 39,058,198,707.98
  5. Step 5: Solve for x
    x = 39,058,198,707.98/203,157.60
  6. Step 6: Final answer
    x = 192,255.66

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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.