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Finding the Fourth Proportional to 203,971.65, 281,253.96 and 139,451.40

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Solution

The fourth proportional to 203,971.65, 281,253.96 and 139,451.40 is: 192,287.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,971.65 : 281,253.96 = 139,451.40 : x
  2. Step 2: Convert to fraction form
    203,971.65/281,253.96 = 139,451.40/x
  3. Step 3: Cross multiply
    203,971.65x = 281,253.96 × 139,451.40
  4. Step 4: Simplify right side
    203,971.65x = 39,221,258,477.54
  5. Step 5: Solve for x
    x = 39,221,258,477.54/203,971.65
  6. Step 6: Final answer
    x = 192,287.79

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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.