Finding the Fourth Proportional to 79,939.28, 119,986.68 and 38,415.44
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Solution
The fourth proportional to 79,939.28, 119,986.68 and 38,415.44 is: 57,660.53
Step by Step Solution
- Step 1: Write the proportion equation
79,939.28 : 119,986.68 = 38,415.44 : x - Step 2: Convert to fraction form
79,939.28/119,986.68 = 38,415.44/x - Step 3: Cross multiply
79,939.28x = 119,986.68 × 38,415.44 - Step 4: Simplify right side
79,939.28x = 4,609,341,106.34 - Step 5: Solve for x
x = 4,609,341,106.34/79,939.28 - Step 6: Final answer
x = 57,660.53
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.