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Finding the Fourth Proportional to 122,447.60, 168,994.74 and 68,012

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Solution

The fourth proportional to 122,447.60, 168,994.74 and 68,012 is: 93,866.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,447.60 : 168,994.74 = 68,012 : x
  2. Step 2: Convert to fraction form
    122,447.60/168,994.74 = 68,012/x
  3. Step 3: Cross multiply
    122,447.60x = 168,994.74 × 68,012
  4. Step 4: Simplify right side
    122,447.60x = 11,493,670,256.88
  5. Step 5: Solve for x
    x = 11,493,670,256.88/122,447.60
  6. Step 6: Final answer
    x = 93,866.03

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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.