Home / 222,115.20-306,516.48-121,512

Finding the Fourth Proportional to 222,115.20, 306,516.48 and 121,512

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Solution

The fourth proportional to 222,115.20, 306,516.48 and 121,512 is: 167,685.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,115.20 : 306,516.48 = 121,512 : x
  2. Step 2: Convert to fraction form
    222,115.20/306,516.48 = 121,512/x
  3. Step 3: Cross multiply
    222,115.20x = 306,516.48 × 121,512
  4. Step 4: Simplify right side
    222,115.20x = 37,245,430,517.76
  5. Step 5: Solve for x
    x = 37,245,430,517.76/222,115.20
  6. Step 6: Final answer
    x = 167,685.19

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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.