Finding the Fourth Proportional to 76,876.90, 115,373.70 and 51,857.62
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Solution
The fourth proportional to 76,876.90, 115,373.70 and 51,857.62 is: 77,825.79
Step by Step Solution
- Step 1: Write the proportion equation
76,876.90 : 115,373.70 = 51,857.62 : x - Step 2: Convert to fraction form
76,876.90/115,373.70 = 51,857.62/x - Step 3: Cross multiply
76,876.90x = 115,373.70 × 51,857.62 - Step 4: Simplify right side
76,876.90x = 5,983,005,492.59 - Step 5: Solve for x
x = 5,983,005,492.59/76,876.90 - Step 6: Final answer
x = 77,825.79
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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.