Finding the Fourth Proportional to 76,821.12, 115,303.05 and 39,407.94
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Solution
The fourth proportional to 76,821.12, 115,303.05 and 39,407.94 is: 59,148.52
Step by Step Solution
- Step 1: Write the proportion equation
76,821.12 : 115,303.05 = 39,407.94 : x - Step 2: Convert to fraction form
76,821.12/115,303.05 = 39,407.94/x - Step 3: Cross multiply
76,821.12x = 115,303.05 × 39,407.94 - Step 4: Simplify right side
76,821.12x = 4,543,855,676.22 - Step 5: Solve for x
x = 4,543,855,676.22/76,821.12 - Step 6: Final answer
x = 59,148.52
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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.