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Finding the Fourth Proportional to 192,711.60, 289,067.40 and 121,852.80

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Solution

The fourth proportional to 192,711.60, 289,067.40 and 121,852.80 is: 182,779.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,711.60 : 289,067.40 = 121,852.80 : x
  2. Step 2: Convert to fraction form
    192,711.60/289,067.40 = 121,852.80/x
  3. Step 3: Cross multiply
    192,711.60x = 289,067.40 × 121,852.80
  4. Step 4: Simplify right side
    192,711.60x = 35,223,672,078.72
  5. Step 5: Solve for x
    x = 35,223,672,078.72/192,711.60
  6. Step 6: Final answer
    x = 182,779.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.