Finding the Fourth Proportional to 100,660.53, 138,911.99 and 55,342.52
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Solution
The fourth proportional to 100,660.53, 138,911.99 and 55,342.52 is: 76,372.92
Step by Step Solution
- Step 1: Write the proportion equation
100,660.53 : 138,911.99 = 55,342.52 : x - Step 2: Convert to fraction form
100,660.53/138,911.99 = 55,342.52/x - Step 3: Cross multiply
100,660.53x = 138,911.99 × 55,342.52 - Step 4: Simplify right side
100,660.53x = 7,687,738,613.54 - Step 5: Solve for x
x = 7,687,738,613.54/100,660.53 - Step 6: Final answer
x = 76,372.92
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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.