Finding the Fourth Proportional to 100,718.64, 138,992.64 and 54,778.68
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Solution
The fourth proportional to 100,718.64, 138,992.64 and 54,778.68 is: 75,595.08
Step by Step Solution
- Step 1: Write the proportion equation
100,718.64 : 138,992.64 = 54,778.68 : x - Step 2: Convert to fraction form
100,718.64/138,992.64 = 54,778.68/x - Step 3: Cross multiply
100,718.64x = 138,992.64 × 54,778.68 - Step 4: Simplify right side
100,718.64x = 7,613,833,348.92 - Step 5: Solve for x
x = 7,613,833,348.92/100,718.64 - Step 6: Final answer
x = 75,595.08
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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.