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Finding the Fourth Proportional to 222,393, 306,903.42 and 121,791

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Solution

The fourth proportional to 222,393, 306,903.42 and 121,791 is: 168,072.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,393 : 306,903.42 = 121,791 : x
  2. Step 2: Convert to fraction form
    222,393/306,903.42 = 121,791/x
  3. Step 3: Cross multiply
    222,393x = 306,903.42 × 121,791
  4. Step 4: Simplify right side
    222,393x = 37,378,074,425.22
  5. Step 5: Solve for x
    x = 37,378,074,425.22/222,393
  6. Step 6: Final answer
    x = 168,072.17

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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.