Finding the Fourth Proportional to 221,718.54, 305,965.17 and 121,116.54
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Solution
The fourth proportional to 221,718.54, 305,965.17 and 121,116.54 is: 167,137.32
Step by Step Solution
- Step 1: Write the proportion equation
221,718.54 : 305,965.17 = 121,116.54 : x - Step 2: Convert to fraction form
221,718.54/305,965.17 = 121,116.54/x - Step 3: Cross multiply
221,718.54x = 305,965.17 × 121,116.54 - Step 4: Simplify right side
221,718.54x = 37,057,442,750.91 - Step 5: Solve for x
x = 37,057,442,750.91/221,718.54 - Step 6: Final answer
x = 167,137.32
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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.