Finding the Fourth Proportional to 90,660,207.70, 135,990,311.55 and 76,630,165.30
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Solution
The fourth proportional to 90,660,207.70, 135,990,311.55 and 76,630,165.30 is: 114,945,247.95
Step by Step Solution
- Step 1: Write the proportion equation
90,660,207.70 : 135,990,311.55 = 76,630,165.30 : x - Step 2: Convert to fraction form
90,660,207.70/135,990,311.55 = 76,630,165.30/x - Step 3: Cross multiply
90,660,207.70x = 135,990,311.55 × 76,630,165.30 - Step 4: Simplify right side
90,660,207.70x = 10,420,960,053,275,000 - Step 5: Solve for x
x = 10,420,960,053,275,000/90,660,207.70 - Step 6: Final answer
x = 114,945,247.95
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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.