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Finding the Fourth Proportional to 222,321.72, 306,803.34 and 121,719

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Solution

The fourth proportional to 222,321.72, 306,803.34 and 121,719 is: 167,971.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,321.72 : 306,803.34 = 121,719 : x
  2. Step 2: Convert to fraction form
    222,321.72/306,803.34 = 121,719/x
  3. Step 3: Cross multiply
    222,321.72x = 306,803.34 × 121,719
  4. Step 4: Simplify right side
    222,321.72x = 37,343,795,741.46
  5. Step 5: Solve for x
    x = 37,343,795,741.46/222,321.72
  6. Step 6: Final answer
    x = 167,971.87

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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.