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Finding the Fourth Proportional to 201,690.34, 278,330.38 and 111,044.45

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Solution

The fourth proportional to 201,690.34, 278,330.38 and 111,044.45 is: 153,240.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,690.34 : 278,330.38 = 111,044.45 : x
  2. Step 2: Convert to fraction form
    201,690.34/278,330.38 = 111,044.45/x
  3. Step 3: Cross multiply
    201,690.34x = 278,330.38 × 111,044.45
  4. Step 4: Simplify right side
    201,690.34x = 30,907,044,383.61
  5. Step 5: Solve for x
    x = 30,907,044,383.61/201,690.34
  6. Step 6: Final answer
    x = 153,240.08

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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.