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Finding the Fourth Proportional to 69,991.91, 104,804.85 and 38,336.12

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Solution

The fourth proportional to 69,991.91, 104,804.85 and 38,336.12 is: 57,403.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,991.91 : 104,804.85 = 38,336.12 : x
  2. Step 2: Convert to fraction form
    69,991.91/104,804.85 = 38,336.12/x
  3. Step 3: Cross multiply
    69,991.91x = 104,804.85 × 38,336.12
  4. Step 4: Simplify right side
    69,991.91x = 4,017,810,782.16
  5. Step 5: Solve for x
    x = 4,017,810,782.16/69,991.91
  6. Step 6: Final answer
    x = 57,403.94

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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.