Finding the Fourth Proportional to 68,640.80, 102,961.20 and 53,895.20
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Solution
The fourth proportional to 68,640.80, 102,961.20 and 53,895.20 is: 80,842.80
Step by Step Solution
- Step 1: Write the proportion equation
68,640.80 : 102,961.20 = 53,895.20 : x - Step 2: Convert to fraction form
68,640.80/102,961.20 = 53,895.20/x - Step 3: Cross multiply
68,640.80x = 102,961.20 × 53,895.20 - Step 4: Simplify right side
68,640.80x = 5,549,114,466.24 - Step 5: Solve for x
x = 5,549,114,466.24/68,640.80 - Step 6: Final answer
x = 80,842.80
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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.