Finding the Fourth Proportional to 128,351.44, 177,053.84 and 74,630.52
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Solution
The fourth proportional to 128,351.44, 177,053.84 and 74,630.52 is: 102,948.75
Step by Step Solution
- Step 1: Write the proportion equation
128,351.44 : 177,053.84 = 74,630.52 : x - Step 2: Convert to fraction form
128,351.44/177,053.84 = 74,630.52/x - Step 3: Cross multiply
128,351.44x = 177,053.84 × 74,630.52 - Step 4: Simplify right side
128,351.44x = 13,213,620,147.20 - Step 5: Solve for x
x = 13,213,620,147.20/128,351.44 - Step 6: Final answer
x = 102,948.75
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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.