Finding the Fourth Proportional to 131,640.80, 197,461.20 and 68,655.20
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Solution
The fourth proportional to 131,640.80, 197,461.20 and 68,655.20 is: 102,982.80
Step by Step Solution
- Step 1: Write the proportion equation
131,640.80 : 197,461.20 = 68,655.20 : x - Step 2: Convert to fraction form
131,640.80/197,461.20 = 68,655.20/x - Step 3: Cross multiply
131,640.80x = 197,461.20 × 68,655.20 - Step 4: Simplify right side
131,640.80x = 13,556,738,178.24 - Step 5: Solve for x
x = 13,556,738,178.24/131,640.80 - Step 6: Final answer
x = 102,982.80
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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.