Finding the Fourth Proportional to 86,643.08, 129,668.90 and 72,618.95
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Solution
The fourth proportional to 86,643.08, 129,668.90 and 72,618.95 is: 108,680.56
Step by Step Solution
- Step 1: Write the proportion equation
86,643.08 : 129,668.90 = 72,618.95 : x - Step 2: Convert to fraction form
86,643.08/129,668.90 = 72,618.95/x - Step 3: Cross multiply
86,643.08x = 129,668.90 × 72,618.95 - Step 4: Simplify right side
86,643.08x = 9,416,419,005.83 - Step 5: Solve for x
x = 9,416,419,005.83/86,643.08 - Step 6: Final answer
x = 108,680.56
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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.