Finding the Fourth Proportional to 129,356.76, 178,512.27 and 72,768.13
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Solution
The fourth proportional to 129,356.76, 178,512.27 and 72,768.13 is: 100,419.99
Step by Step Solution
- Step 1: Write the proportion equation
129,356.76 : 178,512.27 = 72,768.13 : x - Step 2: Convert to fraction form
129,356.76/178,512.27 = 72,768.13/x - Step 3: Cross multiply
129,356.76x = 178,512.27 × 72,768.13 - Step 4: Simplify right side
129,356.76x = 12,990,004,069.96 - Step 5: Solve for x
x = 12,990,004,069.96/129,356.76 - Step 6: Final answer
x = 100,419.99
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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.