Finding the Fourth Proportional to 128,460.71, 177,280.58 and 71,872.49
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Solution
The fourth proportional to 128,460.71, 177,280.58 and 71,872.49 is: 99,186.72
Step by Step Solution
- Step 1: Write the proportion equation
128,460.71 : 177,280.58 = 71,872.49 : x - Step 2: Convert to fraction form
128,460.71/177,280.58 = 71,872.49/x - Step 3: Cross multiply
128,460.71x = 177,280.58 × 71,872.49 - Step 4: Simplify right side
128,460.71x = 12,741,596,713.24 - Step 5: Solve for x
x = 12,741,596,713.24/128,460.71 - Step 6: Final answer
x = 99,186.72
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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.