Finding the Fourth Proportional to 129,695.38, 178,974.97 and 72,331.58
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Solution
The fourth proportional to 129,695.38, 178,974.97 and 72,331.58 is: 99,814.99
Step by Step Solution
- Step 1: Write the proportion equation
129,695.38 : 178,974.97 = 72,331.58 : x - Step 2: Convert to fraction form
129,695.38/178,974.97 = 72,331.58/x - Step 3: Cross multiply
129,695.38x = 178,974.97 × 72,331.58 - Step 4: Simplify right side
129,695.38x = 12,945,542,627.16 - Step 5: Solve for x
x = 12,945,542,627.16/129,695.38 - Step 6: Final answer
x = 99,814.99
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1.5x scale
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.