Finding the Fourth Proportional to 76,639.80, 115,679.54 and 76,639.80
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Solution
The fourth proportional to 76,639.80, 115,679.54 and 76,639.80 is: 115,679.54
Step by Step Solution
- Step 1: Write the proportion equation
76,639.80 : 115,679.54 = 76,639.80 : x - Step 2: Convert to fraction form
76,639.80/115,679.54 = 76,639.80/x - Step 3: Cross multiply
76,639.80x = 115,679.54 × 76,639.80 - Step 4: Simplify right side
76,639.80x = 8,865,657,435.09 - Step 5: Solve for x
x = 8,865,657,435.09/76,639.80 - Step 6: Final answer
x = 115,679.54
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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.