Finding the Fourth Proportional to 100,420.05, 138,581.07 and 55,097.19
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Solution
The fourth proportional to 100,420.05, 138,581.07 and 55,097.19 is: 76,034.89
Step by Step Solution
- Step 1: Write the proportion equation
100,420.05 : 138,581.07 = 55,097.19 : x - Step 2: Convert to fraction form
100,420.05/138,581.07 = 55,097.19/x - Step 3: Cross multiply
100,420.05x = 138,581.07 × 55,097.19 - Step 4: Simplify right side
100,420.05x = 7,635,427,544.19 - Step 5: Solve for x
x = 7,635,427,544.19/100,420.05 - Step 6: Final answer
x = 76,034.89
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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.