Finding the Fourth Proportional to 86,722.48, 129,982.36 and 36,785.68
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Solution
The fourth proportional to 86,722.48, 129,982.36 and 36,785.68 is: 55,135.53
Step by Step Solution
- Step 1: Write the proportion equation
86,722.48 : 129,982.36 = 36,785.68 : x - Step 2: Convert to fraction form
86,722.48/129,982.36 = 36,785.68/x - Step 3: Cross multiply
86,722.48x = 129,982.36 × 36,785.68 - Step 4: Simplify right side
86,722.48x = 4,781,489,500.60 - Step 5: Solve for x
x = 4,781,489,500.60/86,722.48 - Step 6: Final answer
x = 55,135.53
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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.