Finding the Fourth Proportional to 143,407.13, 197,906.63 and 78,879.09
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Solution
The fourth proportional to 143,407.13, 197,906.63 and 78,879.09 is: 108,855.78
Step by Step Solution
- Step 1: Write the proportion equation
143,407.13 : 197,906.63 = 78,879.09 : x - Step 2: Convert to fraction form
143,407.13/197,906.63 = 78,879.09/x - Step 3: Cross multiply
143,407.13x = 197,906.63 × 78,879.09 - Step 4: Simplify right side
143,407.13x = 15,610,694,879.37 - Step 5: Solve for x
x = 15,610,694,879.37/143,407.13 - Step 6: Final answer
x = 108,855.78
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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.