Finding the Fourth Proportional to 80,998.20, 121,439.66 and 31,036.05
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Solution
The fourth proportional to 80,998.20, 121,439.66 and 31,036.05 is: 46,531.99
Step by Step Solution
- Step 1: Write the proportion equation
80,998.20 : 121,439.66 = 31,036.05 : x - Step 2: Convert to fraction form
80,998.20/121,439.66 = 31,036.05/x - Step 3: Cross multiply
80,998.20x = 121,439.66 × 31,036.05 - Step 4: Simplify right side
80,998.20x = 3,769,007,204.56 - Step 5: Solve for x
x = 3,769,007,204.56/80,998.20 - Step 6: Final answer
x = 46,531.99
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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.