Finding the Fourth Proportional to 221,720.92, 305,975.82 and 121,121.08
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Solution
The fourth proportional to 221,720.92, 305,975.82 and 121,121.08 is: 167,147.61
Step by Step Solution
- Step 1: Write the proportion equation
221,720.92 : 305,975.82 = 121,121.08 : x - Step 2: Convert to fraction form
221,720.92/305,975.82 = 121,121.08/x - Step 3: Cross multiply
221,720.92x = 305,975.82 × 121,121.08 - Step 4: Simplify right side
221,720.92x = 37,060,121,772.29 - Step 5: Solve for x
x = 37,060,121,772.29/221,720.92 - Step 6: Final answer
x = 167,147.61
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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.