Finding the Fourth Proportional to 100,103.55, 138,129.21 and 59,808.75
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Solution
The fourth proportional to 100,103.55, 138,129.21 and 59,808.75 is: 82,527.90
Step by Step Solution
- Step 1: Write the proportion equation
100,103.55 : 138,129.21 = 59,808.75 : x - Step 2: Convert to fraction form
100,103.55/138,129.21 = 59,808.75/x - Step 3: Cross multiply
100,103.55x = 138,129.21 × 59,808.75 - Step 4: Simplify right side
100,103.55x = 8,261,335,388.59 - Step 5: Solve for x
x = 8,261,335,388.59/100,103.55 - Step 6: Final answer
x = 82,527.90
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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.