Finding the Fourth Proportional to 128,846.20, 193,787.70 and 115,367.80
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Solution
The fourth proportional to 128,846.20, 193,787.70 and 115,367.80 is: 173,515.87
Step by Step Solution
- Step 1: Write the proportion equation
128,846.20 : 193,787.70 = 115,367.80 : x - Step 2: Convert to fraction form
128,846.20/193,787.70 = 115,367.80/x - Step 3: Cross multiply
128,846.20x = 193,787.70 × 115,367.80 - Step 4: Simplify right side
128,846.20x = 22,356,860,616.06 - Step 5: Solve for x
x = 22,356,860,616.06/128,846.20 - Step 6: Final answer
x = 173,515.87
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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.