Finding the Fourth Proportional to 128,471.20, 192,706.80 and 34,976.80
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Solution
The fourth proportional to 128,471.20, 192,706.80 and 34,976.80 is: 52,465.20
Step by Step Solution
- Step 1: Write the proportion equation
128,471.20 : 192,706.80 = 34,976.80 : x - Step 2: Convert to fraction form
128,471.20/192,706.80 = 34,976.80/x - Step 3: Cross multiply
128,471.20x = 192,706.80 × 34,976.80 - Step 4: Simplify right side
128,471.20x = 6,740,267,202.24 - Step 5: Solve for x
x = 6,740,267,202.24/128,471.20 - Step 6: Final answer
x = 52,465.20
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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.