Finding the Fourth Proportional to 86,458.05, 129,784.28 and 66,823.65
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Solution
The fourth proportional to 86,458.05, 129,784.28 and 66,823.65 is: 100,310.60
Step by Step Solution
- Step 1: Write the proportion equation
86,458.05 : 129,784.28 = 66,823.65 : x - Step 2: Convert to fraction form
86,458.05/129,784.28 = 66,823.65/x - Step 3: Cross multiply
86,458.05x = 129,784.28 × 66,823.65 - Step 4: Simplify right side
86,458.05x = 8,672,658,968.10 - Step 5: Solve for x
x = 8,672,658,968.10/86,458.05 - Step 6: Final answer
x = 100,310.60
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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.