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Finding the Fourth Proportional to 201,920.09, 278,651.55 and 111,279.29

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Solution

The fourth proportional to 201,920.09, 278,651.55 and 111,279.29 is: 153,566.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,920.09 : 278,651.55 = 111,279.29 : x
  2. Step 2: Convert to fraction form
    201,920.09/278,651.55 = 111,279.29/x
  3. Step 3: Cross multiply
    201,920.09x = 278,651.55 × 111,279.29
  4. Step 4: Simplify right side
    201,920.09x = 31,008,145,248.14
  5. Step 5: Solve for x
    x = 31,008,145,248.14/201,920.09
  6. Step 6: Final answer
    x = 153,566.42

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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.