Finding the Fourth Proportional to 128,411.44, 177,198.16 and 71,811.88
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Solution
The fourth proportional to 128,411.44, 177,198.16 and 71,811.88 is: 99,095.00
Step by Step Solution
- Step 1: Write the proportion equation
128,411.44 : 177,198.16 = 71,811.88 : x - Step 2: Convert to fraction form
128,411.44/177,198.16 = 71,811.88/x - Step 3: Cross multiply
128,411.44x = 177,198.16 × 71,811.88 - Step 4: Simplify right side
128,411.44x = 12,724,931,757.09 - Step 5: Solve for x
x = 12,724,931,757.09/128,411.44 - Step 6: Final answer
x = 99,095.00
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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.