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Finding the Fourth Proportional to 74,218.50, 102,421.89 and 44,410.50

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Solution

The fourth proportional to 74,218.50, 102,421.89 and 44,410.50 is: 61,286.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,218.50 : 102,421.89 = 44,410.50 : x
  2. Step 2: Convert to fraction form
    74,218.50/102,421.89 = 44,410.50/x
  3. Step 3: Cross multiply
    74,218.50x = 102,421.89 × 44,410.50
  4. Step 4: Simplify right side
    74,218.50x = 4,548,607,345.85
  5. Step 5: Solve for x
    x = 4,548,607,345.85/74,218.50
  6. Step 6: Final answer
    x = 61,286.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.