Finding the Fourth Proportional to 129,093.68, 178,166.01 and 72,505.07
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Solution
The fourth proportional to 129,093.68, 178,166.01 and 72,505.07 is: 100,066.39
Step by Step Solution
- Step 1: Write the proportion equation
129,093.68 : 178,166.01 = 72,505.07 : x - Step 2: Convert to fraction form
129,093.68/178,166.01 = 72,505.07/x - Step 3: Cross multiply
129,093.68x = 178,166.01 × 72,505.07 - Step 4: Simplify right side
129,093.68x = 12,917,939,026.67 - Step 5: Solve for x
x = 12,917,939,026.67/129,093.68 - Step 6: Final answer
x = 100,066.39
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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.