Finding the Fourth Proportional to 258,582.60, 387,873.84 and 81,105.12
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Solution
The fourth proportional to 258,582.60, 387,873.84 and 81,105.12 is: 121,657.66
Step by Step Solution
- Step 1: Write the proportion equation
258,582.60 : 387,873.84 = 81,105.12 : x - Step 2: Convert to fraction form
258,582.60/387,873.84 = 81,105.12/x - Step 3: Cross multiply
258,582.60x = 387,873.84 × 81,105.12 - Step 4: Simplify right side
258,582.60x = 31,458,554,338.06 - Step 5: Solve for x
x = 31,458,554,338.06/258,582.60 - Step 6: Final answer
x = 121,657.66
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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.