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Finding the Fourth Proportional to 52,064.87, 78,097.05 and 12,621.99

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Solution

The fourth proportional to 52,064.87, 78,097.05 and 12,621.99 is: 18,932.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,064.87 : 78,097.05 = 12,621.99 : x
  2. Step 2: Convert to fraction form
    52,064.87/78,097.05 = 12,621.99/x
  3. Step 3: Cross multiply
    52,064.87x = 78,097.05 × 12,621.99
  4. Step 4: Simplify right side
    52,064.87x = 985,740,184.13
  5. Step 5: Solve for x
    x = 985,740,184.13/52,064.87
  6. Step 6: Final answer
    x = 18,932.92

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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.