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Finding the Fourth Proportional to 223,894.69, 308,970.25 and 121,921.36

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Solution

The fourth proportional to 223,894.69, 308,970.25 and 121,921.36 is: 168,249.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,894.69 : 308,970.25 = 121,921.36 : x
  2. Step 2: Convert to fraction form
    223,894.69/308,970.25 = 121,921.36/x
  3. Step 3: Cross multiply
    223,894.69x = 308,970.25 × 121,921.36
  4. Step 4: Simplify right side
    223,894.69x = 37,670,072,002.31
  5. Step 5: Solve for x
    x = 37,670,072,002.31/223,894.69
  6. Step 6: Final answer
    x = 168,249.07

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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.