Finding the Fourth Proportional to 81,888.75, 122,701.50 and 68,766.75
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Solution
The fourth proportional to 81,888.75, 122,701.50 and 68,766.75 is: 103,039.59
Step by Step Solution
- Step 1: Write the proportion equation
81,888.75 : 122,701.50 = 68,766.75 : x - Step 2: Convert to fraction form
81,888.75/122,701.50 = 68,766.75/x - Step 3: Cross multiply
81,888.75x = 122,701.50 × 68,766.75 - Step 4: Simplify right side
81,888.75x = 8,437,783,375.13 - Step 5: Solve for x
x = 8,437,783,375.13/81,888.75 - Step 6: Final answer
x = 103,039.59
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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.