Finding the Fourth Proportional to 87,139.08, 120,194.64 and 69,205.68
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Solution
The fourth proportional to 87,139.08, 120,194.64 and 69,205.68 is: 95,458.34
Step by Step Solution
- Step 1: Write the proportion equation
87,139.08 : 120,194.64 = 69,205.68 : x - Step 2: Convert to fraction form
87,139.08/120,194.64 = 69,205.68/x - Step 3: Cross multiply
87,139.08x = 120,194.64 × 69,205.68 - Step 4: Simplify right side
87,139.08x = 8,318,151,793.56 - Step 5: Solve for x
x = 8,318,151,793.56/87,139.08 - Step 6: Final answer
x = 95,458.34
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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.