Finding the Fourth Proportional to 128,375.84, 177,158.76 and 71,787.44
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Solution
The fourth proportional to 128,375.84, 177,158.76 and 71,787.44 is: 99,066.72
Step by Step Solution
- Step 1: Write the proportion equation
128,375.84 : 177,158.76 = 71,787.44 : x - Step 2: Convert to fraction form
128,375.84/177,158.76 = 71,787.44/x - Step 3: Cross multiply
128,375.84x = 177,158.76 × 71,787.44 - Step 4: Simplify right side
128,375.84x = 12,717,773,853.97 - Step 5: Solve for x
x = 12,717,773,853.97/128,375.84 - Step 6: Final answer
x = 99,066.72
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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.