Finding the Fourth Proportional to 212,921,803.20, 319,382,704.80 and 120,769,933.80
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Solution
The fourth proportional to 212,921,803.20, 319,382,704.80 and 120,769,933.80 is: 181,154,900.70
Step by Step Solution
- Step 1: Write the proportion equation
212,921,803.20 : 319,382,704.80 = 120,769,933.80 : x - Step 2: Convert to fraction form
212,921,803.20/319,382,704.80 = 120,769,933.80/x - Step 3: Cross multiply
212,921,803.20x = 319,382,704.80 × 120,769,933.80 - Step 4: Simplify right side
212,921,803.20x = 38,571,828,115,560,944 - Step 5: Solve for x
x = 38,571,828,115,560,944/212,921,803.20 - Step 6: Final answer
x = 181,154,900.70
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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.