Finding the Fourth Proportional to 87,321.80, 130,982.70 and 21,657.80
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Solution
The fourth proportional to 87,321.80, 130,982.70 and 21,657.80 is: 32,486.70
Step by Step Solution
- Step 1: Write the proportion equation
87,321.80 : 130,982.70 = 21,657.80 : x - Step 2: Convert to fraction form
87,321.80/130,982.70 = 21,657.80/x - Step 3: Cross multiply
87,321.80x = 130,982.70 × 21,657.80 - Step 4: Simplify right side
87,321.80x = 2,836,797,120.06 - Step 5: Solve for x
x = 2,836,797,120.06/87,321.80 - Step 6: Final answer
x = 32,486.70
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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.