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Finding the Fourth Proportional to 66,217.87, 91,379.96 and 49,297.78

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Solution

The fourth proportional to 66,217.87, 91,379.96 and 49,297.78 is: 68,030.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,217.87 : 91,379.96 = 49,297.78 : x
  2. Step 2: Convert to fraction form
    66,217.87/91,379.96 = 49,297.78/x
  3. Step 3: Cross multiply
    66,217.87x = 91,379.96 × 49,297.78
  4. Step 4: Simplify right side
    66,217.87x = 4,504,828,461.10
  5. Step 5: Solve for x
    x = 4,504,828,461.10/66,217.87
  6. Step 6: Final answer
    x = 68,030.41

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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.