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Finding the Fourth Proportional to 223,889.09, 308,962.49 and 121,915.76

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Solution

The fourth proportional to 223,889.09, 308,962.49 and 121,915.76 is: 168,241.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,889.09 : 308,962.49 = 121,915.76 : x
  2. Step 2: Convert to fraction form
    223,889.09/308,962.49 = 121,915.76/x
  3. Step 3: Cross multiply
    223,889.09x = 308,962.49 × 121,915.76
  4. Step 4: Simplify right side
    223,889.09x = 37,667,394,625.45
  5. Step 5: Solve for x
    x = 37,667,394,625.45/223,889.09
  6. Step 6: Final answer
    x = 168,241.32

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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.