Finding the Fourth Proportional to 128,031.84, 176,622.12 and 80,267.76
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Solution
The fourth proportional to 128,031.84, 176,622.12 and 80,267.76 is: 110,730.75
Step by Step Solution
- Step 1: Write the proportion equation
128,031.84 : 176,622.12 = 80,267.76 : x - Step 2: Convert to fraction form
128,031.84/176,622.12 = 80,267.76/x - Step 3: Cross multiply
128,031.84x = 176,622.12 × 80,267.76 - Step 4: Simplify right side
128,031.84x = 14,177,061,938.85 - Step 5: Solve for x
x = 14,177,061,938.85/128,031.84 - Step 6: Final answer
x = 110,730.75
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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.