Finding the Fourth Proportional to 121,403.19, 166,645.06 and 107,674.30
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Solution
The fourth proportional to 121,403.19, 166,645.06 and 107,674.30 is: 147,799.99
Step by Step Solution
- Step 1: Write the proportion equation
121,403.19 : 166,645.06 = 107,674.30 : x - Step 2: Convert to fraction form
121,403.19/166,645.06 = 107,674.30/x - Step 3: Cross multiply
121,403.19x = 166,645.06 × 107,674.30 - Step 4: Simplify right side
121,403.19x = 17,943,390,183.96 - Step 5: Solve for x
x = 17,943,390,183.96/121,403.19 - Step 6: Final answer
x = 147,799.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.