Finding the Fourth Proportional to 81,647.49, 122,478.98 and 31,731.44
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Solution
The fourth proportional to 81,647.49, 122,478.98 and 31,731.44 is: 47,600.17
Step by Step Solution
- Step 1: Write the proportion equation
81,647.49 : 122,478.98 = 31,731.44 : x - Step 2: Convert to fraction form
81,647.49/122,478.98 = 31,731.44/x - Step 3: Cross multiply
81,647.49x = 122,478.98 × 31,731.44 - Step 4: Simplify right side
81,647.49x = 3,886,434,405.13 - Step 5: Solve for x
x = 3,886,434,405.13/81,647.49 - Step 6: Final answer
x = 47,600.17
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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.