Finding the Fourth Proportional to 128,245.62, 176,979.65 and 70,102.44
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Solution
The fourth proportional to 128,245.62, 176,979.65 and 70,102.44 is: 96,741.75
Step by Step Solution
- Step 1: Write the proportion equation
128,245.62 : 176,979.65 = 70,102.44 : x - Step 2: Convert to fraction form
128,245.62/176,979.65 = 70,102.44/x - Step 3: Cross multiply
128,245.62x = 176,979.65 × 70,102.44 - Step 4: Simplify right side
128,245.62x = 12,406,705,295.35 - Step 5: Solve for x
x = 12,406,705,295.35/128,245.62 - Step 6: Final answer
x = 96,741.75
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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.