Finding the Fourth Proportional to 81,198.24, 121,740.12 and 31,236.36
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Solution
The fourth proportional to 81,198.24, 121,740.12 and 31,236.36 is: 46,832.52
Step by Step Solution
- Step 1: Write the proportion equation
81,198.24 : 121,740.12 = 31,236.36 : x - Step 2: Convert to fraction form
81,198.24/121,740.12 = 31,236.36/x - Step 3: Cross multiply
81,198.24x = 121,740.12 × 31,236.36 - Step 4: Simplify right side
81,198.24x = 3,802,718,214.76 - Step 5: Solve for x
x = 3,802,718,214.76/81,198.24 - Step 6: Final answer
x = 46,832.52
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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.