Finding the Fourth Proportional to 81,211.12, 121,799.94 and 31,274.08
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Solution
The fourth proportional to 81,211.12, 121,799.94 and 31,274.08 is: 46,904.67
Step by Step Solution
- Step 1: Write the proportion equation
81,211.12 : 121,799.94 = 31,274.08 : x - Step 2: Convert to fraction form
81,211.12/121,799.94 = 31,274.08/x - Step 3: Cross multiply
81,211.12x = 121,799.94 × 31,274.08 - Step 4: Simplify right side
81,211.12x = 3,809,181,067.56 - Step 5: Solve for x
x = 3,809,181,067.56/81,211.12 - Step 6: Final answer
x = 46,904.67
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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.