Finding the Fourth Proportional to 128,910.69, 177,914.88 and 75,224.70
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Solution
The fourth proportional to 128,910.69, 177,914.88 and 75,224.70 is: 103,820.66
Step by Step Solution
- Step 1: Write the proportion equation
128,910.69 : 177,914.88 = 75,224.70 : x - Step 2: Convert to fraction form
128,910.69/177,914.88 = 75,224.70/x - Step 3: Cross multiply
128,910.69x = 177,914.88 × 75,224.70 - Step 4: Simplify right side
128,910.69x = 13,383,593,473.54 - Step 5: Solve for x
x = 13,383,593,473.54/128,910.69 - Step 6: Final answer
x = 103,820.66
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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.