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Finding the Fourth Proportional to 223,494.31, 308,418.74 and 121,518.96

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Solution

The fourth proportional to 223,494.31, 308,418.74 and 121,518.96 is: 167,694.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,494.31 : 308,418.74 = 121,518.96 : x
  2. Step 2: Convert to fraction form
    223,494.31/308,418.74 = 121,518.96/x
  3. Step 3: Cross multiply
    223,494.31x = 308,418.74 × 121,518.96
  4. Step 4: Simplify right side
    223,494.31x = 37,478,722,379.62
  5. Step 5: Solve for x
    x = 37,478,722,379.62/223,494.31
  6. Step 6: Final answer
    x = 167,694.30

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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.