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Finding the Fourth Proportional to 223,456.89, 308,376.59 and 121,489.21

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Solution

The fourth proportional to 223,456.89, 308,376.59 and 121,489.21 is: 167,658.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,456.89 : 308,376.59 = 121,489.21 : x
  2. Step 2: Convert to fraction form
    223,456.89/308,376.59 = 121,489.21/x
  3. Step 3: Cross multiply
    223,456.89x = 308,376.59 × 121,489.21
  4. Step 4: Simplify right side
    223,456.89x = 37,464,428,301.59
  5. Step 5: Solve for x
    x = 37,464,428,301.59/223,456.89
  6. Step 6: Final answer
    x = 167,658.42

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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.