Finding the Fourth Proportional to 128,321,857.80, 192,482,786.70 and 77,303,521.80
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Solution
The fourth proportional to 128,321,857.80, 192,482,786.70 and 77,303,521.80 is: 115,955,282.70
Step by Step Solution
- Step 1: Write the proportion equation
128,321,857.80 : 192,482,786.70 = 77,303,521.80 : x - Step 2: Convert to fraction form
128,321,857.80/192,482,786.70 = 77,303,521.80/x - Step 3: Cross multiply
128,321,857.80x = 192,482,786.70 × 77,303,521.80 - Step 4: Simplify right side
128,321,857.80x = 14,879,597,297,788,198 - Step 5: Solve for x
x = 14,879,597,297,788,198/128,321,857.80 - Step 6: Final answer
x = 115,955,282.70
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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.