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Finding the Fourth Proportional to 51,216.70, 76,828.65 and 29,040.70

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Solution

The fourth proportional to 51,216.70, 76,828.65 and 29,040.70 is: 43,563.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,216.70 : 76,828.65 = 29,040.70 : x
  2. Step 2: Convert to fraction form
    51,216.70/76,828.65 = 29,040.70/x
  3. Step 3: Cross multiply
    51,216.70x = 76,828.65 × 29,040.70
  4. Step 4: Simplify right side
    51,216.70x = 2,231,157,776.06
  5. Step 5: Solve for x
    x = 2,231,157,776.06/51,216.70
  6. Step 6: Final answer
    x = 43,563.09

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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.