Finding the Fourth Proportional to 81,321.08, 121,969.29 and 22,161.47
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Solution
The fourth proportional to 81,321.08, 121,969.29 and 22,161.47 is: 33,238.84
Step by Step Solution
- Step 1: Write the proportion equation
81,321.08 : 121,969.29 = 22,161.47 : x - Step 2: Convert to fraction form
81,321.08/121,969.29 = 22,161.47/x - Step 3: Cross multiply
81,321.08x = 121,969.29 × 22,161.47 - Step 4: Simplify right side
81,321.08x = 2,703,018,761.26 - Step 5: Solve for x
x = 2,703,018,761.26/81,321.08 - Step 6: Final answer
x = 33,238.84
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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.