Finding the Fourth Proportional to 121,490.40, 167,589.36 and 71,179.68
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Solution
The fourth proportional to 121,490.40, 167,589.36 and 71,179.68 is: 98,188.47
Step by Step Solution
- Step 1: Write the proportion equation
121,490.40 : 167,589.36 = 71,179.68 : x - Step 2: Convert to fraction form
121,490.40/167,589.36 = 71,179.68/x - Step 3: Cross multiply
121,490.40x = 167,589.36 × 71,179.68 - Step 4: Simplify right side
121,490.40x = 11,928,957,016.20 - Step 5: Solve for x
x = 11,928,957,016.20/121,490.40 - Step 6: Final answer
x = 98,188.47
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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.