Finding the Fourth Proportional to 129,542.13, 178,765.29 and 72,181.44
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Solution
The fourth proportional to 129,542.13, 178,765.29 and 72,181.44 is: 99,608.80
Step by Step Solution
- Step 1: Write the proportion equation
129,542.13 : 178,765.29 = 72,181.44 : x - Step 2: Convert to fraction form
129,542.13/178,765.29 = 72,181.44/x - Step 3: Cross multiply
129,542.13x = 178,765.29 × 72,181.44 - Step 4: Simplify right side
129,542.13x = 12,903,536,054.22 - Step 5: Solve for x
x = 12,903,536,054.22/129,542.13 - Step 6: Final answer
x = 99,608.80
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.