Finding the Fourth Proportional to 76,645.28, 115,687.84 and 76,645.28
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Solution
The fourth proportional to 76,645.28, 115,687.84 and 76,645.28 is: 115,687.84
Step by Step Solution
- Step 1: Write the proportion equation
76,645.28 : 115,687.84 = 76,645.28 : x - Step 2: Convert to fraction form
76,645.28/115,687.84 = 76,645.28/x - Step 3: Cross multiply
76,645.28x = 115,687.84 × 76,645.28 - Step 4: Simplify right side
76,645.28x = 8,866,926,889.40 - Step 5: Solve for x
x = 8,866,926,889.40/76,645.28 - Step 6: Final answer
x = 115,687.84
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.