Finding the Fourth Proportional to 76,821.80, 115,232.70 and 72,447.80
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Solution
The fourth proportional to 76,821.80, 115,232.70 and 72,447.80 is: 108,671.70
Step by Step Solution
- Step 1: Write the proportion equation
76,821.80 : 115,232.70 = 72,447.80 : x - Step 2: Convert to fraction form
76,821.80/115,232.70 = 72,447.80/x - Step 3: Cross multiply
76,821.80x = 115,232.70 × 72,447.80 - Step 4: Simplify right side
76,821.80x = 8,348,355,603.06 - Step 5: Solve for x
x = 8,348,355,603.06/76,821.80 - Step 6: Final answer
x = 108,671.70
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1.5x scale
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.