Finding the Fourth Proportional to 128,771.70, 192,610.80 and 115,540.35
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Solution
The fourth proportional to 128,771.70, 192,610.80 and 115,540.35 is: 172,819.95
Step by Step Solution
- Step 1: Write the proportion equation
128,771.70 : 192,610.80 = 115,540.35 : x - Step 2: Convert to fraction form
128,771.70/192,610.80 = 115,540.35/x - Step 3: Cross multiply
128,771.70x = 192,610.80 × 115,540.35 - Step 4: Simplify right side
128,771.70x = 22,254,319,245.78 - Step 5: Solve for x
x = 22,254,319,245.78/128,771.70 - Step 6: Final answer
x = 172,819.95
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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.