Finding the Fourth Proportional to 76,512.75, 114,775.74 and 21,108.75
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Solution
The fourth proportional to 76,512.75, 114,775.74 and 21,108.75 is: 31,664.95
Step by Step Solution
- Step 1: Write the proportion equation
76,512.75 : 114,775.74 = 21,108.75 : x - Step 2: Convert to fraction form
76,512.75/114,775.74 = 21,108.75/x - Step 3: Cross multiply
76,512.75x = 114,775.74 × 21,108.75 - Step 4: Simplify right side
76,512.75x = 2,422,772,401.73 - Step 5: Solve for x
x = 2,422,772,401.73/76,512.75 - Step 6: Final answer
x = 31,664.95
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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.