Finding the Fourth Proportional to 71,990.46, 107,977.95 and 19,405.26
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Solution
The fourth proportional to 71,990.46, 107,977.95 and 19,405.26 is: 29,105.80
Step by Step Solution
- Step 1: Write the proportion equation
71,990.46 : 107,977.95 = 19,405.26 : x - Step 2: Convert to fraction form
71,990.46/107,977.95 = 19,405.26/x - Step 3: Cross multiply
71,990.46x = 107,977.95 × 19,405.26 - Step 4: Simplify right side
71,990.46x = 2,095,340,194.02 - Step 5: Solve for x
x = 2,095,340,194.02/71,990.46 - Step 6: Final answer
x = 29,105.80
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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.