Finding the Fourth Proportional to 76,788.35, 115,184.34 and 20,628.53
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Solution
The fourth proportional to 76,788.35, 115,184.34 and 20,628.53 is: 30,943.28
Step by Step Solution
- Step 1: Write the proportion equation
76,788.35 : 115,184.34 = 20,628.53 : x - Step 2: Convert to fraction form
76,788.35/115,184.34 = 20,628.53/x - Step 3: Cross multiply
76,788.35x = 115,184.34 × 20,628.53 - Step 4: Simplify right side
76,788.35x = 2,376,083,037.30 - Step 5: Solve for x
x = 2,376,083,037.30/76,788.35 - Step 6: Final answer
x = 30,943.28
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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.