Finding the Fourth Proportional to 139,617.94, 207,847.80 and 138,787.58
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Solution
The fourth proportional to 139,617.94, 207,847.80 and 138,787.58 is: 206,611.65
Step by Step Solution
- Step 1: Write the proportion equation
139,617.94 : 207,847.80 = 138,787.58 : x - Step 2: Convert to fraction form
139,617.94/207,847.80 = 138,787.58/x - Step 3: Cross multiply
139,617.94x = 207,847.80 × 138,787.58 - Step 4: Simplify right side
139,617.94x = 28,846,693,170.32 - Step 5: Solve for x
x = 28,846,693,170.32/139,617.94 - Step 6: Final answer
x = 206,611.65
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.