Finding the Fourth Proportional to 128,717.22, 177,620.81 and 71,355.99
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Solution
The fourth proportional to 128,717.22, 177,620.81 and 71,355.99 is: 98,466.30
Step by Step Solution
- Step 1: Write the proportion equation
128,717.22 : 177,620.81 = 71,355.99 : x - Step 2: Convert to fraction form
128,717.22/177,620.81 = 71,355.99/x - Step 3: Cross multiply
128,717.22x = 177,620.81 × 71,355.99 - Step 4: Simplify right side
128,717.22x = 12,674,308,385.37 - Step 5: Solve for x
x = 12,674,308,385.37/128,717.22 - Step 6: Final answer
x = 98,466.30
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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.