Finding the Fourth Proportional to 128,571.62, 177,263.94 and 99,842.54
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Solution
The fourth proportional to 128,571.62, 177,263.94 and 99,842.54 is: 137,654.66
Step by Step Solution
- Step 1: Write the proportion equation
128,571.62 : 177,263.94 = 99,842.54 : x - Step 2: Convert to fraction form
128,571.62/177,263.94 = 99,842.54/x - Step 3: Cross multiply
128,571.62x = 177,263.94 × 99,842.54 - Step 4: Simplify right side
128,571.62x = 17,698,482,020.01 - Step 5: Solve for x
x = 17,698,482,020.01/128,571.62 - Step 6: Final answer
x = 137,654.66
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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.