Finding the Fourth Proportional to 221,129.64, 305,137.83 and 129,270.41
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Solution
The fourth proportional to 221,129.64, 305,137.83 and 129,270.41 is: 178,380.84
Step by Step Solution
- Step 1: Write the proportion equation
221,129.64 : 305,137.83 = 129,270.41 : x - Step 2: Convert to fraction form
221,129.64/305,137.83 = 129,270.41/x - Step 3: Cross multiply
221,129.64x = 305,137.83 × 129,270.41 - Step 4: Simplify right side
221,129.64x = 39,445,290,864.92 - Step 5: Solve for x
x = 39,445,290,864.92/221,129.64 - Step 6: Final answer
x = 178,380.84
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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.