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Finding the Fourth Proportional to 222,318.78, 306,799.92 and 121,716.78

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Solution

The fourth proportional to 222,318.78, 306,799.92 and 121,716.78 is: 167,969.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,318.78 : 306,799.92 = 121,716.78 : x
  2. Step 2: Convert to fraction form
    222,318.78/306,799.92 = 121,716.78/x
  3. Step 3: Cross multiply
    222,318.78x = 306,799.92 × 121,716.78
  4. Step 4: Simplify right side
    222,318.78x = 37,342,698,366.66
  5. Step 5: Solve for x
    x = 37,342,698,366.66/222,318.78
  6. Step 6: Final answer
    x = 167,969.16

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1.5x scale

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.