Finding the Fourth Proportional to 121,420.80, 182,120.96 and 68,664.32
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Solution
The fourth proportional to 121,420.80, 182,120.96 and 68,664.32 is: 102,990.69
Step by Step Solution
- Step 1: Write the proportion equation
121,420.80 : 182,120.96 = 68,664.32 : x - Step 2: Convert to fraction form
121,420.80/182,120.96 = 68,664.32/x - Step 3: Cross multiply
121,420.80x = 182,120.96 × 68,664.32 - Step 4: Simplify right side
121,420.80x = 12,505,211,876.15 - Step 5: Solve for x
x = 12,505,211,876.15/121,420.80 - Step 6: Final answer
x = 102,990.69
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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.