Finding the Fourth Proportional to 128,949.22, 177,957.98 and 74,503.72
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Solution
The fourth proportional to 128,949.22, 177,957.98 and 74,503.72 is: 102,819.79
Step by Step Solution
- Step 1: Write the proportion equation
128,949.22 : 177,957.98 = 74,503.72 : x - Step 2: Convert to fraction form
128,949.22/177,957.98 = 74,503.72/x - Step 3: Cross multiply
128,949.22x = 177,957.98 × 74,503.72 - Step 4: Simplify right side
128,949.22x = 13,258,531,513.69 - Step 5: Solve for x
x = 13,258,531,513.69/128,949.22 - Step 6: Final answer
x = 102,819.79
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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.