Finding the Fourth Proportional to 221,721.14, 305,975.18 and 121,119.14
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Solution
The fourth proportional to 221,721.14, 305,975.18 and 121,119.14 is: 167,144.42
Step by Step Solution
- Step 1: Write the proportion equation
221,721.14 : 305,975.18 = 121,119.14 : x - Step 2: Convert to fraction form
221,721.14/305,975.18 = 121,119.14/x - Step 3: Cross multiply
221,721.14x = 305,975.18 × 121,119.14 - Step 4: Simplify right side
221,721.14x = 37,059,450,662.95 - Step 5: Solve for x
x = 37,059,450,662.95/221,721.14 - Step 6: Final answer
x = 167,144.42
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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.