Finding the Fourth Proportional to 129,133.24, 178,194.63 and 80,756.90
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Solution
The fourth proportional to 129,133.24, 178,194.63 and 80,756.90 is: 111,438.75
Step by Step Solution
- Step 1: Write the proportion equation
129,133.24 : 178,194.63 = 80,756.90 : x - Step 2: Convert to fraction form
129,133.24/178,194.63 = 80,756.90/x - Step 3: Cross multiply
129,133.24x = 178,194.63 × 80,756.90 - Step 4: Simplify right side
129,133.24x = 14,390,445,995.54 - Step 5: Solve for x
x = 14,390,445,995.54/129,133.24 - Step 6: Final answer
x = 111,438.75
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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.