Finding the Fourth Proportional to 129,678.13, 178,955.67 and 70,062.13
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Solution
The fourth proportional to 129,678.13, 178,955.67 and 70,062.13 is: 96,685.66
Step by Step Solution
- Step 1: Write the proportion equation
129,678.13 : 178,955.67 = 70,062.13 : x - Step 2: Convert to fraction form
129,678.13/178,955.67 = 70,062.13/x - Step 3: Cross multiply
129,678.13x = 178,955.67 × 70,062.13 - Step 4: Simplify right side
129,678.13x = 12,538,015,415.78 - Step 5: Solve for x
x = 12,538,015,415.78/129,678.13 - Step 6: Final answer
x = 96,685.66
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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.