Finding the Fourth Proportional to 128,822.09, 177,783.93 and 71,470.44
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Solution
The fourth proportional to 128,822.09, 177,783.93 and 71,470.44 is: 98,634.45
Step by Step Solution
- Step 1: Write the proportion equation
128,822.09 : 177,783.93 = 71,470.44 : x - Step 2: Convert to fraction form
128,822.09/177,783.93 = 71,470.44/x - Step 3: Cross multiply
128,822.09x = 177,783.93 × 71,470.44 - Step 4: Simplify right side
128,822.09x = 12,706,295,702.03 - Step 5: Solve for x
x = 12,706,295,702.03/128,822.09 - Step 6: Final answer
x = 98,634.45
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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.