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Finding the Fourth Proportional to 223,696.31, 308,696.33 and 121,723.79

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Solution

The fourth proportional to 223,696.31, 308,696.33 and 121,723.79 is: 167,976.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,696.31 : 308,696.33 = 121,723.79 : x
  2. Step 2: Convert to fraction form
    223,696.31/308,696.33 = 121,723.79/x
  3. Step 3: Cross multiply
    223,696.31x = 308,696.33 × 121,723.79
  4. Step 4: Simplify right side
    223,696.31x = 37,575,685,094.59
  5. Step 5: Solve for x
    x = 37,575,685,094.59/223,696.31
  6. Step 6: Final answer
    x = 167,976.33

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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.