Finding the Fourth Proportional to 120,431.36, 180,672.12 and 36,188.12
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Solution
The fourth proportional to 120,431.36, 180,672.12 and 36,188.12 is: 54,289.72
Step by Step Solution
- Step 1: Write the proportion equation
120,431.36 : 180,672.12 = 36,188.12 : x - Step 2: Convert to fraction form
120,431.36/180,672.12 = 36,188.12/x - Step 3: Cross multiply
120,431.36x = 180,672.12 × 36,188.12 - Step 4: Simplify right side
120,431.36x = 6,538,184,359.21 - Step 5: Solve for x
x = 6,538,184,359.21/120,431.36 - Step 6: Final answer
x = 54,289.72
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1.5x scale
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.