Finding the Fourth Proportional to 221,717.54, 305,963.79 and 121,115.54
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Solution
The fourth proportional to 221,717.54, 305,963.79 and 121,115.54 is: 167,135.94
Step by Step Solution
- Step 1: Write the proportion equation
221,717.54 : 305,963.79 = 121,115.54 : x - Step 2: Convert to fraction form
221,717.54/305,963.79 = 121,115.54/x - Step 3: Cross multiply
221,717.54x = 305,963.79 × 121,115.54 - Step 4: Simplify right side
221,717.54x = 37,056,969,646.30 - Step 5: Solve for x
x = 37,056,969,646.30/221,717.54 - Step 6: Final answer
x = 167,135.94
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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.