Finding the Fourth Proportional to 81,605.21, 122,393.70 and 21,634.08
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Solution
The fourth proportional to 81,605.21, 122,393.70 and 21,634.08 is: 32,447.37
Step by Step Solution
- Step 1: Write the proportion equation
81,605.21 : 122,393.70 = 21,634.08 : x - Step 2: Convert to fraction form
81,605.21/122,393.70 = 21,634.08/x - Step 3: Cross multiply
81,605.21x = 122,393.70 × 21,634.08 - Step 4: Simplify right side
81,605.21x = 2,647,874,638.32 - Step 5: Solve for x
x = 2,647,874,638.32/81,605.21 - Step 6: Final answer
x = 32,447.37
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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.