Finding the Fourth Proportional to 128,407.36, 177,187.84 and 71,817.60
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Solution
The fourth proportional to 128,407.36, 177,187.84 and 71,817.60 is: 99,100.28
Step by Step Solution
- Step 1: Write the proportion equation
128,407.36 : 177,187.84 = 71,817.60 : x - Step 2: Convert to fraction form
128,407.36/177,187.84 = 71,817.60/x - Step 3: Cross multiply
128,407.36x = 177,187.84 × 71,817.60 - Step 4: Simplify right side
128,407.36x = 12,725,205,417.98 - Step 5: Solve for x
x = 12,725,205,417.98/128,407.36 - Step 6: Final answer
x = 99,100.28
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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.