Finding the Fourth Proportional to 209,907.20, 314,860.80 and 76,791.80
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Solution
The fourth proportional to 209,907.20, 314,860.80 and 76,791.80 is: 115,187.70
Step by Step Solution
- Step 1: Write the proportion equation
209,907.20 : 314,860.80 = 76,791.80 : x - Step 2: Convert to fraction form
209,907.20/314,860.80 = 76,791.80/x - Step 3: Cross multiply
209,907.20x = 314,860.80 × 76,791.80 - Step 4: Simplify right side
209,907.20x = 24,178,727,581.44 - Step 5: Solve for x
x = 24,178,727,581.44/209,907.20 - Step 6: Final answer
x = 115,187.70
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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.