Finding the Fourth Proportional to 100,293.81, 138,409.97 and 57,277.05
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Solution
The fourth proportional to 100,293.81, 138,409.97 and 57,277.05 is: 79,044.91
Step by Step Solution
- Step 1: Write the proportion equation
100,293.81 : 138,409.97 = 57,277.05 : x - Step 2: Convert to fraction form
100,293.81/138,409.97 = 57,277.05/x - Step 3: Cross multiply
100,293.81x = 138,409.97 × 57,277.05 - Step 4: Simplify right side
100,293.81x = 7,927,714,772.19 - Step 5: Solve for x
x = 7,927,714,772.19/100,293.81 - Step 6: Final answer
x = 79,044.91
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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.