Finding the Fourth Proportional to 208,539.60, 312,809.40 and 129,613.20
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Solution
The fourth proportional to 208,539.60, 312,809.40 and 129,613.20 is: 194,419.80
Step by Step Solution
- Step 1: Write the proportion equation
208,539.60 : 312,809.40 = 129,613.20 : x - Step 2: Convert to fraction form
208,539.60/312,809.40 = 129,613.20/x - Step 3: Cross multiply
208,539.60x = 312,809.40 × 129,613.20 - Step 4: Simplify right side
208,539.60x = 40,544,227,324.08 - Step 5: Solve for x
x = 40,544,227,324.08/208,539.60 - Step 6: Final answer
x = 194,419.80
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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.