Finding the Fourth Proportional to 74,912.12, 103,379.08 and 40,921.08
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Solution
The fourth proportional to 74,912.12, 103,379.08 and 40,921.08 is: 56,471.28
Step by Step Solution
- Step 1: Write the proportion equation
74,912.12 : 103,379.08 = 40,921.08 : x - Step 2: Convert to fraction form
74,912.12/103,379.08 = 40,921.08/x - Step 3: Cross multiply
74,912.12x = 103,379.08 × 40,921.08 - Step 4: Simplify right side
74,912.12x = 4,230,383,885.68 - Step 5: Solve for x
x = 4,230,383,885.68/74,912.12 - Step 6: Final answer
x = 56,471.28
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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.