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Finding the Fourth Proportional to 79,857.60, 119,786.40 and 65,860.80

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Solution

The fourth proportional to 79,857.60, 119,786.40 and 65,860.80 is: 98,791.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,857.60 : 119,786.40 = 65,860.80 : x
  2. Step 2: Convert to fraction form
    79,857.60/119,786.40 = 65,860.80/x
  3. Step 3: Cross multiply
    79,857.60x = 119,786.40 × 65,860.80
  4. Step 4: Simplify right side
    79,857.60x = 7,889,228,133.12
  5. Step 5: Solve for x
    x = 7,889,228,133.12/79,857.60
  6. Step 6: Final answer
    x = 98,791.20

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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.