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Finding the Fourth Proportional to 86,586.30, 129,879.45 and 53,198.10

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Solution

The fourth proportional to 86,586.30, 129,879.45 and 53,198.10 is: 79,797.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,586.30 : 129,879.45 = 53,198.10 : x
  2. Step 2: Convert to fraction form
    86,586.30/129,879.45 = 53,198.10/x
  3. Step 3: Cross multiply
    86,586.30x = 129,879.45 × 53,198.10
  4. Step 4: Simplify right side
    86,586.30x = 6,909,339,969.05
  5. Step 5: Solve for x
    x = 6,909,339,969.05/86,586.30
  6. Step 6: Final answer
    x = 79,797.15

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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.