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Finding the Fourth Proportional to 201,920.18, 278,651.77 and 111,279.47

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Solution

The fourth proportional to 201,920.18, 278,651.77 and 111,279.47 is: 153,566.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,920.18 : 278,651.77 = 111,279.47 : x
  2. Step 2: Convert to fraction form
    201,920.18/278,651.77 = 111,279.47/x
  3. Step 3: Cross multiply
    201,920.18x = 278,651.77 × 111,279.47
  4. Step 4: Simplify right side
    201,920.18x = 31,008,219,608.70
  5. Step 5: Solve for x
    x = 31,008,219,608.70/201,920.18
  6. Step 6: Final answer
    x = 153,566.72

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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.