Finding the Fourth Proportional to 128,971.57, 177,837.01 and 83,589.97
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Solution
The fourth proportional to 128,971.57, 177,837.01 and 83,589.97 is: 115,260.99
Step by Step Solution
- Step 1: Write the proportion equation
128,971.57 : 177,837.01 = 83,589.97 : x - Step 2: Convert to fraction form
128,971.57/177,837.01 = 83,589.97/x - Step 3: Cross multiply
128,971.57x = 177,837.01 × 83,589.97 - Step 4: Simplify right side
128,971.57x = 14,865,390,330.79 - Step 5: Solve for x
x = 14,865,390,330.79/128,971.57 - Step 6: Final answer
x = 115,260.99
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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.