Finding the Fourth Proportional to 128,830.44, 177,787.84 and 77,836.08
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Solution
The fourth proportional to 128,830.44, 177,787.84 and 77,836.08 is: 107,414.90
Step by Step Solution
- Step 1: Write the proportion equation
128,830.44 : 177,787.84 = 77,836.08 : x - Step 2: Convert to fraction form
128,830.44/177,787.84 = 77,836.08/x - Step 3: Cross multiply
128,830.44x = 177,787.84 × 77,836.08 - Step 4: Simplify right side
128,830.44x = 13,838,308,537.27 - Step 5: Solve for x
x = 13,838,308,537.27/128,830.44 - Step 6: Final answer
x = 107,414.90
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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.