Finding the Fourth Proportional to 128,917.80, 193,376.70 and 113,365.80
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Solution
The fourth proportional to 128,917.80, 193,376.70 and 113,365.80 is: 170,048.70
Step by Step Solution
- Step 1: Write the proportion equation
128,917.80 : 193,376.70 = 113,365.80 : x - Step 2: Convert to fraction form
128,917.80/193,376.70 = 113,365.80/x - Step 3: Cross multiply
128,917.80x = 193,376.70 × 113,365.80 - Step 4: Simplify right side
128,917.80x = 21,922,304,296.86 - Step 5: Solve for x
x = 21,922,304,296.86/128,917.80 - Step 6: Final answer
x = 170,048.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.