Finding the Fourth Proportional to 128,361.24, 177,146.64 and 71,772.84
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Solution
The fourth proportional to 128,361.24, 177,146.64 and 71,772.84 is: 99,051.06
Step by Step Solution
- Step 1: Write the proportion equation
128,361.24 : 177,146.64 = 71,772.84 : x - Step 2: Convert to fraction form
128,361.24/177,146.64 = 71,772.84/x - Step 3: Cross multiply
128,361.24x = 177,146.64 × 71,772.84 - Step 4: Simplify right side
128,361.24x = 12,714,317,449.26 - Step 5: Solve for x
x = 12,714,317,449.26/128,361.24 - Step 6: Final answer
x = 99,051.06
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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.