Finding the Fourth Proportional to 128,591.18, 177,449.63 and 71,226.62
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Solution
The fourth proportional to 128,591.18, 177,449.63 and 71,226.62 is: 98,289.30
Step by Step Solution
- Step 1: Write the proportion equation
128,591.18 : 177,449.63 = 71,226.62 : x - Step 2: Convert to fraction form
128,591.18/177,449.63 = 71,226.62/x - Step 3: Cross multiply
128,591.18x = 177,449.63 × 71,226.62 - Step 4: Simplify right side
128,591.18x = 12,639,137,365.15 - Step 5: Solve for x
x = 12,639,137,365.15/128,591.18 - Step 6: Final answer
x = 98,289.30
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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.