Finding the Fourth Proportional to 129,493.94, 178,729.21 and 87,027.87
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Solution
The fourth proportional to 129,493.94, 178,729.21 and 87,027.87 is: 120,116.99
Step by Step Solution
- Step 1: Write the proportion equation
129,493.94 : 178,729.21 = 87,027.87 : x - Step 2: Convert to fraction form
129,493.94/178,729.21 = 87,027.87/x - Step 3: Cross multiply
129,493.94x = 178,729.21 × 87,027.87 - Step 4: Simplify right side
129,493.94x = 15,554,421,981.98 - Step 5: Solve for x
x = 15,554,421,981.98/129,493.94 - Step 6: Final answer
x = 120,116.99
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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.