Finding the Fourth Proportional to 128,377.43, 177,159.81 and 71,788.80
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Solution
The fourth proportional to 128,377.43, 177,159.81 and 71,788.80 is: 99,067.96
Step by Step Solution
- Step 1: Write the proportion equation
128,377.43 : 177,159.81 = 71,788.80 : x - Step 2: Convert to fraction form
128,377.43/177,159.81 = 71,788.80/x - Step 3: Cross multiply
128,377.43x = 177,159.81 × 71,788.80 - Step 4: Simplify right side
128,377.43x = 12,718,090,168.13 - Step 5: Solve for x
x = 12,718,090,168.13/128,377.43 - Step 6: Final answer
x = 99,067.96
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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.