Finding the Fourth Proportional to 76,869.19, 115,467.67 and 72,374.90
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Solution
The fourth proportional to 76,869.19, 115,467.67 and 72,374.90 is: 108,716.66
Step by Step Solution
- Step 1: Write the proportion equation
76,869.19 : 115,467.67 = 72,374.90 : x - Step 2: Convert to fraction form
76,869.19/115,467.67 = 72,374.90/x - Step 3: Cross multiply
76,869.19x = 115,467.67 × 72,374.90 - Step 4: Simplify right side
76,869.19x = 8,356,961,069.48 - Step 5: Solve for x
x = 8,356,961,069.48/76,869.19 - Step 6: Final answer
x = 108,716.66
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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.