Finding the Fourth Proportional to 128,213.64, 176,922.88 and 74,498.08
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Solution
The fourth proportional to 128,213.64, 176,922.88 and 74,498.08 is: 102,800.41
Step by Step Solution
- Step 1: Write the proportion equation
128,213.64 : 176,922.88 = 74,498.08 : x - Step 2: Convert to fraction form
128,213.64/176,922.88 = 74,498.08/x - Step 3: Cross multiply
128,213.64x = 176,922.88 × 74,498.08 - Step 4: Simplify right side
128,213.64x = 13,180,414,868.07 - Step 5: Solve for x
x = 13,180,414,868.07/128,213.64 - Step 6: Final answer
x = 102,800.41
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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.