Finding the Fourth Proportional to 128,550.60, 177,378.75 and 80,770.14
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Solution
The fourth proportional to 128,550.60, 177,378.75 and 80,770.14 is: 111,449.55
Step by Step Solution
- Step 1: Write the proportion equation
128,550.60 : 177,378.75 = 80,770.14 : x - Step 2: Convert to fraction form
128,550.60/177,378.75 = 80,770.14/x - Step 3: Cross multiply
128,550.60x = 177,378.75 × 80,770.14 - Step 4: Simplify right side
128,550.60x = 14,326,906,470.53 - Step 5: Solve for x
x = 14,326,906,470.53/128,550.60 - Step 6: Final answer
x = 111,449.55
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1.5x scale
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.