Finding the Fourth Proportional to 129,141.75, 178,214.27 and 73,943.75
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Solution
The fourth proportional to 129,141.75, 178,214.27 and 73,943.75 is: 102,041.60
Step by Step Solution
- Step 1: Write the proportion equation
129,141.75 : 178,214.27 = 73,943.75 : x - Step 2: Convert to fraction form
129,141.75/178,214.27 = 73,943.75/x - Step 3: Cross multiply
129,141.75x = 178,214.27 × 73,943.75 - Step 4: Simplify right side
129,141.75x = 13,177,831,427.31 - Step 5: Solve for x
x = 13,177,831,427.31/129,141.75 - Step 6: Final answer
x = 102,041.60
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1.5x scale
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.