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Finding the Fourth Proportional to 92,674.56, 138,990.52 and 55,245.20

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Solution

The fourth proportional to 92,674.56, 138,990.52 and 55,245.20 is: 82,855.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,674.56 : 138,990.52 = 55,245.20 : x
  2. Step 2: Convert to fraction form
    92,674.56/138,990.52 = 55,245.20/x
  3. Step 3: Cross multiply
    92,674.56x = 138,990.52 × 55,245.20
  4. Step 4: Simplify right side
    92,674.56x = 7,678,559,075.50
  5. Step 5: Solve for x
    x = 7,678,559,075.50/92,674.56
  6. Step 6: Final answer
    x = 82,855.09

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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.