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Finding the Fourth Proportional to 122,379.79, 168,883.91 and 68,669.80

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Solution

The fourth proportional to 122,379.79, 168,883.91 and 68,669.80 is: 94,764.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,379.79 : 168,883.91 = 68,669.80 : x
  2. Step 2: Convert to fraction form
    122,379.79/168,883.91 = 68,669.80/x
  3. Step 3: Cross multiply
    122,379.79x = 168,883.91 × 68,669.80
  4. Step 4: Simplify right side
    122,379.79x = 11,597,223,135.15
  5. Step 5: Solve for x
    x = 11,597,223,135.15/122,379.79
  6. Step 6: Final answer
    x = 94,764.21

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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.