Finding the Fourth Proportional to 135,449.13, 186,921.18 and 81,723.78
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Solution
The fourth proportional to 135,449.13, 186,921.18 and 81,723.78 is: 112,779.65
Step by Step Solution
- Step 1: Write the proportion equation
135,449.13 : 186,921.18 = 81,723.78 : x - Step 2: Convert to fraction form
135,449.13/186,921.18 = 81,723.78/x - Step 3: Cross multiply
135,449.13x = 186,921.18 × 81,723.78 - Step 4: Simplify right side
135,449.13x = 15,275,905,391.66 - Step 5: Solve for x
x = 15,275,905,391.66/135,449.13 - Step 6: Final answer
x = 112,779.65
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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.