Finding the Fourth Proportional to 129,428.01, 194,129.19 and 40,679.28
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Solution
The fourth proportional to 129,428.01, 194,129.19 and 40,679.28 is: 61,014.89
Step by Step Solution
- Step 1: Write the proportion equation
129,428.01 : 194,129.19 = 40,679.28 : x - Step 2: Convert to fraction form
129,428.01/194,129.19 = 40,679.28/x - Step 3: Cross multiply
129,428.01x = 194,129.19 × 40,679.28 - Step 4: Simplify right side
129,428.01x = 7,897,035,676.18 - Step 5: Solve for x
x = 7,897,035,676.18/129,428.01 - Step 6: Final answer
x = 61,014.89
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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.