Finding the Fourth Proportional to 128,385.14, 192,660.32 and 69,261.62
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Solution
The fourth proportional to 128,385.14, 192,660.32 and 69,261.62 is: 103,936.99
Step by Step Solution
- Step 1: Write the proportion equation
128,385.14 : 192,660.32 = 69,261.62 : x - Step 2: Convert to fraction form
128,385.14/192,660.32 = 69,261.62/x - Step 3: Cross multiply
128,385.14x = 192,660.32 × 69,261.62 - Step 4: Simplify right side
128,385.14x = 13,343,965,082.77 - Step 5: Solve for x
x = 13,343,965,082.77/128,385.14 - Step 6: Final answer
x = 103,936.99
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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.