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Finding the Fourth Proportional to 222,310.80, 306,788.88 and 121,708.80

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Solution

The fourth proportional to 222,310.80, 306,788.88 and 121,708.80 is: 167,958.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,310.80 : 306,788.88 = 121,708.80 : x
  2. Step 2: Convert to fraction form
    222,310.80/306,788.88 = 121,708.80/x
  3. Step 3: Cross multiply
    222,310.80x = 306,788.88 × 121,708.80
  4. Step 4: Simplify right side
    222,310.80x = 37,338,906,438.14
  5. Step 5: Solve for x
    x = 37,338,906,438.14/222,310.80
  6. Step 6: Final answer
    x = 167,958.13

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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.