Finding the Fourth Proportional to 149,043.75, 205,683.62 and 81,975.75
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Solution
The fourth proportional to 149,043.75, 205,683.62 and 81,975.75 is: 113,128.32
Step by Step Solution
- Step 1: Write the proportion equation
149,043.75 : 205,683.62 = 81,975.75 : x - Step 2: Convert to fraction form
149,043.75/205,683.62 = 81,975.75/x - Step 3: Cross multiply
149,043.75x = 205,683.62 × 81,975.75 - Step 4: Simplify right side
149,043.75x = 16,861,068,602.34 - Step 5: Solve for x
x = 16,861,068,602.34/149,043.75 - Step 6: Final answer
x = 113,128.32
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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.