Finding the Fourth Proportional to 213,261.23, 319,803.01 and 86,815.70
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Solution
The fourth proportional to 213,261.23, 319,803.01 and 86,815.70 is: 130,187.39
Step by Step Solution
- Step 1: Write the proportion equation
213,261.23 : 319,803.01 = 86,815.70 : x - Step 2: Convert to fraction form
213,261.23/319,803.01 = 86,815.70/x - Step 3: Cross multiply
213,261.23x = 319,803.01 × 86,815.70 - Step 4: Simplify right side
213,261.23x = 27,763,922,757.73 - Step 5: Solve for x
x = 27,763,922,757.73/213,261.23 - Step 6: Final answer
x = 130,187.39
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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.