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Finding the Fourth Proportional to 122,443.60, 168,989.22 and 68,008

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Solution

The fourth proportional to 122,443.60, 168,989.22 and 68,008 is: 93,860.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,443.60 : 168,989.22 = 68,008 : x
  2. Step 2: Convert to fraction form
    122,443.60/168,989.22 = 68,008/x
  3. Step 3: Cross multiply
    122,443.60x = 168,989.22 × 68,008
  4. Step 4: Simplify right side
    122,443.60x = 11,492,618,873.76
  5. Step 5: Solve for x
    x = 11,492,618,873.76/122,443.60
  6. Step 6: Final answer
    x = 93,860.51

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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.