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Finding the Fourth Proportional to 74,520.50, 102,786.21 and 50,605.65

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Solution

The fourth proportional to 74,520.50, 102,786.21 and 50,605.65 is: 69,800.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,520.50 : 102,786.21 = 50,605.65 : x
  2. Step 2: Convert to fraction form
    74,520.50/102,786.21 = 50,605.65/x
  3. Step 3: Cross multiply
    74,520.50x = 102,786.21 × 50,605.65
  4. Step 4: Simplify right side
    74,520.50x = 5,201,562,968.09
  5. Step 5: Solve for x
    x = 5,201,562,968.09/74,520.50
  6. Step 6: Final answer
    x = 69,800.44

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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.