Finding the Fourth Proportional to 86,664.60, 129,851.10 and 74,125.80
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Solution
The fourth proportional to 86,664.60, 129,851.10 and 74,125.80 is: 111,063.99
Step by Step Solution
- Step 1: Write the proportion equation
86,664.60 : 129,851.10 = 74,125.80 : x - Step 2: Convert to fraction form
86,664.60/129,851.10 = 74,125.80/x - Step 3: Cross multiply
86,664.60x = 129,851.10 × 74,125.80 - Step 4: Simplify right side
86,664.60x = 9,625,316,668.38 - Step 5: Solve for x
x = 9,625,316,668.38/86,664.60 - Step 6: Final answer
x = 111,063.99
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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.