Finding the Fourth Proportional to 128,392.80, 177,187.35 and 71,031.18
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Solution
The fourth proportional to 128,392.80, 177,187.35 and 71,031.18 is: 98,025.95
Step by Step Solution
- Step 1: Write the proportion equation
128,392.80 : 177,187.35 = 71,031.18 : x - Step 2: Convert to fraction form
128,392.80/177,187.35 = 71,031.18/x - Step 3: Cross multiply
128,392.80x = 177,187.35 × 71,031.18 - Step 4: Simplify right side
128,392.80x = 12,585,826,086.16 - Step 5: Solve for x
x = 12,585,826,086.16/128,392.80 - Step 6: Final answer
x = 98,025.95
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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.