Finding the Fourth Proportional to 129,638.40, 194,457.60 and 121,765.20
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Solution
The fourth proportional to 129,638.40, 194,457.60 and 121,765.20 is: 182,647.80
Step by Step Solution
- Step 1: Write the proportion equation
129,638.40 : 194,457.60 = 121,765.20 : x - Step 2: Convert to fraction form
129,638.40/194,457.60 = 121,765.20/x - Step 3: Cross multiply
129,638.40x = 194,457.60 × 121,765.20 - Step 4: Simplify right side
129,638.40x = 23,678,168,555.52 - Step 5: Solve for x
x = 23,678,168,555.52/129,638.40 - Step 6: Final answer
x = 182,647.80
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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.