Finding the Fourth Proportional to 255,957.21, 383,991.84 and 78,478.07
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Solution
The fourth proportional to 255,957.21, 383,991.84 and 78,478.07 is: 117,734.28
Step by Step Solution
- Step 1: Write the proportion equation
255,957.21 : 383,991.84 = 78,478.07 : x - Step 2: Convert to fraction form
255,957.21/383,991.84 = 78,478.07/x - Step 3: Cross multiply
255,957.21x = 383,991.84 × 78,478.07 - Step 4: Simplify right side
255,957.21x = 30,134,936,578.99 - Step 5: Solve for x
x = 30,134,936,578.99/255,957.21 - Step 6: Final answer
x = 117,734.28
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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.