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Finding the Fourth Proportional to 223,357.11, 308,234.07 and 121,383.42

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Solution

The fourth proportional to 223,357.11, 308,234.07 and 121,383.42 is: 167,509.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,357.11 : 308,234.07 = 121,383.42 : x
  2. Step 2: Convert to fraction form
    223,357.11/308,234.07 = 121,383.42/x
  3. Step 3: Cross multiply
    223,357.11x = 308,234.07 × 121,383.42
  4. Step 4: Simplify right side
    223,357.11x = 37,414,505,577.12
  5. Step 5: Solve for x
    x = 37,414,505,577.12/223,357.11
  6. Step 6: Final answer
    x = 167,509.80

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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.