Finding the Fourth Proportional to 128,735.54, 177,621.69 and 77,707.94
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Solution
The fourth proportional to 128,735.54, 177,621.69 and 77,707.94 is: 107,216.82
Step by Step Solution
- Step 1: Write the proportion equation
128,735.54 : 177,621.69 = 77,707.94 : x - Step 2: Convert to fraction form
128,735.54/177,621.69 = 77,707.94/x - Step 3: Cross multiply
128,735.54x = 177,621.69 × 77,707.94 - Step 4: Simplify right side
128,735.54x = 13,802,615,629.22 - Step 5: Solve for x
x = 13,802,615,629.22/128,735.54 - Step 6: Final answer
x = 107,216.82
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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.