Finding the Fourth Proportional to 81,940,207.80, 122,910,311.70 and 71,862,511.80
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Solution
The fourth proportional to 81,940,207.80, 122,910,311.70 and 71,862,511.80 is: 107,793,767.70
Step by Step Solution
- Step 1: Write the proportion equation
81,940,207.80 : 122,910,311.70 = 71,862,511.80 : x - Step 2: Convert to fraction form
81,940,207.80/122,910,311.70 = 71,862,511.80/x - Step 3: Cross multiply
81,940,207.80x = 122,910,311.70 × 71,862,511.80 - Step 4: Simplify right side
81,940,207.80x = 8,832,643,724,882,928 - Step 5: Solve for x
x = 8,832,643,724,882,928/81,940,207.80 - Step 6: Final answer
x = 107,793,767.70
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1.5x scale
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.