Finding the Fourth Proportional to 129,408.44, 178,584.95 and 72,808.88
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Solution
The fourth proportional to 129,408.44, 178,584.95 and 72,808.88 is: 100,476.99
Step by Step Solution
- Step 1: Write the proportion equation
129,408.44 : 178,584.95 = 72,808.88 : x - Step 2: Convert to fraction form
129,408.44/178,584.95 = 72,808.88/x - Step 3: Cross multiply
129,408.44x = 178,584.95 × 72,808.88 - Step 4: Simplify right side
129,408.44x = 13,002,569,483.45 - Step 5: Solve for x
x = 13,002,569,483.45/129,408.44 - Step 6: Final answer
x = 100,476.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.