Finding the Fourth Proportional to 99,049.12, 136,604.64 and 65,031.55
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Solution
The fourth proportional to 99,049.12, 136,604.64 and 65,031.55 is: 89,688.95
Step by Step Solution
- Step 1: Write the proportion equation
99,049.12 : 136,604.64 = 65,031.55 : x - Step 2: Convert to fraction form
99,049.12/136,604.64 = 65,031.55/x - Step 3: Cross multiply
99,049.12x = 136,604.64 × 65,031.55 - Step 4: Simplify right side
99,049.12x = 8,883,611,378.75 - Step 5: Solve for x
x = 8,883,611,378.75/99,049.12 - Step 6: Final answer
x = 89,688.95
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.