Finding the Fourth Proportional to 128,394.60, 177,229.08 and 88,241.28
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Solution
The fourth proportional to 128,394.60, 177,229.08 and 88,241.28 is: 121,803.57
Step by Step Solution
- Step 1: Write the proportion equation
128,394.60 : 177,229.08 = 88,241.28 : x - Step 2: Convert to fraction form
128,394.60/177,229.08 = 88,241.28/x - Step 3: Cross multiply
128,394.60x = 177,229.08 × 88,241.28 - Step 4: Simplify right side
128,394.60x = 15,638,920,872.42 - Step 5: Solve for x
x = 15,638,920,872.42/128,394.60 - Step 6: Final answer
x = 121,803.57
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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.