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Finding the Fourth Proportional to 122,992.65, 169,745.94 and 69,288.03

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Solution

The fourth proportional to 122,992.65, 169,745.94 and 69,288.03 is: 95,626.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,992.65 : 169,745.94 = 69,288.03 : x
  2. Step 2: Convert to fraction form
    122,992.65/169,745.94 = 69,288.03/x
  3. Step 3: Cross multiply
    122,992.65x = 169,745.94 × 69,288.03
  4. Step 4: Simplify right side
    122,992.65x = 11,761,361,783.10
  5. Step 5: Solve for x
    x = 11,761,361,783.10/122,992.65
  6. Step 6: Final answer
    x = 95,626.54

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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.