Finding the Fourth Proportional to 76,985,123.60, 115,589,659.80 and 57,949,475.60
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Solution
The fourth proportional to 76,985,123.60, 115,589,659.80 and 57,949,475.60 is: 87,008,500.56
Step by Step Solution
- Step 1: Write the proportion equation
76,985,123.60 : 115,589,659.80 = 57,949,475.60 : x - Step 2: Convert to fraction form
76,985,123.60/115,589,659.80 = 57,949,475.60/x - Step 3: Cross multiply
76,985,123.60x = 115,589,659.80 × 57,949,475.60 - Step 4: Simplify right side
76,985,123.60x = 6,698,360,170,192,401 - Step 5: Solve for x
x = 6,698,360,170,192,401/76,985,123.60 - Step 6: Final answer
x = 87,008,500.56
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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.