Finding the Fourth Proportional to 81,643.75, 122,497.11 and 31,758.99
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Solution
The fourth proportional to 81,643.75, 122,497.11 and 31,758.99 is: 47,650.73
Step by Step Solution
- Step 1: Write the proportion equation
81,643.75 : 122,497.11 = 31,758.99 : x - Step 2: Convert to fraction form
81,643.75/122,497.11 = 31,758.99/x - Step 3: Cross multiply
81,643.75x = 122,497.11 × 31,758.99 - Step 4: Simplify right side
81,643.75x = 3,890,384,032.15 - Step 5: Solve for x
x = 3,890,384,032.15/81,643.75 - Step 6: Final answer
x = 47,650.73
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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.