Finding the Fourth Proportional to 212,912,171.80, 319,368,257.70 and 91,743,623.80
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Solution
The fourth proportional to 212,912,171.80, 319,368,257.70 and 91,743,623.80 is: 137,615,435.70
Step by Step Solution
- Step 1: Write the proportion equation
212,912,171.80 : 319,368,257.70 = 91,743,623.80 : x - Step 2: Convert to fraction form
212,912,171.80/319,368,257.70 = 91,743,623.80/x - Step 3: Cross multiply
212,912,171.80x = 319,368,257.70 × 91,743,623.80 - Step 4: Simplify right side
212,912,171.80x = 29,300,001,288,090,252 - Step 5: Solve for x
x = 29,300,001,288,090,252/212,912,171.80 - Step 6: Final answer
x = 137,615,435.70
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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.