Finding the Fourth Proportional to 100,415.42, 138,568.29 and 57,393.62
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Solution
The fourth proportional to 100,415.42, 138,568.29 and 57,393.62 is: 79,200.34
Step by Step Solution
- Step 1: Write the proportion equation
100,415.42 : 138,568.29 = 57,393.62 : x - Step 2: Convert to fraction form
100,415.42/138,568.29 = 57,393.62/x - Step 3: Cross multiply
100,415.42x = 138,568.29 × 57,393.62 - Step 4: Simplify right side
100,415.42x = 7,952,935,780.31 - Step 5: Solve for x
x = 7,952,935,780.31/100,415.42 - Step 6: Final answer
x = 79,200.34
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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.