Finding the Fourth Proportional to 87,885.19, 131,771.91 and 74,562.79
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Solution
The fourth proportional to 87,885.19, 131,771.91 and 74,562.79 is: 111,796.78
Step by Step Solution
- Step 1: Write the proportion equation
87,885.19 : 131,771.91 = 74,562.79 : x - Step 2: Convert to fraction form
87,885.19/131,771.91 = 74,562.79/x - Step 3: Cross multiply
87,885.19x = 131,771.91 × 74,562.79 - Step 4: Simplify right side
87,885.19x = 9,825,281,253.23 - Step 5: Solve for x
x = 9,825,281,253.23/87,885.19 - Step 6: Final answer
x = 111,796.78
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1.5x scale
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.