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Finding the Fourth Proportional to 201,886.80, 278,630.60 and 115,879.76

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Solution

The fourth proportional to 201,886.80, 278,630.60 and 115,879.76 is: 159,929.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,886.80 : 278,630.60 = 115,879.76 : x
  2. Step 2: Convert to fraction form
    201,886.80/278,630.60 = 115,879.76/x
  3. Step 3: Cross multiply
    201,886.80x = 278,630.60 × 115,879.76
  4. Step 4: Simplify right side
    201,886.80x = 32,287,647,056.66
  5. Step 5: Solve for x
    x = 32,287,647,056.66/201,886.80
  6. Step 6: Final answer
    x = 159,929.46

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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.