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Finding the Fourth Proportional to 201,805.35, 278,491.39 and 111,161.04

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Solution

The fourth proportional to 201,805.35, 278,491.39 and 111,161.04 is: 153,402.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,805.35 : 278,491.39 = 111,161.04 : x
  2. Step 2: Convert to fraction form
    201,805.35/278,491.39 = 111,161.04/x
  3. Step 3: Cross multiply
    201,805.35x = 278,491.39 × 111,161.04
  4. Step 4: Simplify right side
    201,805.35x = 30,957,392,543.45
  5. Step 5: Solve for x
    x = 30,957,392,543.45/201,805.35
  6. Step 6: Final answer
    x = 153,402.24

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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.