Finding the Fourth Proportional to 151,621.68, 209,235.60 and 87,970.44
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Solution
The fourth proportional to 151,621.68, 209,235.60 and 87,970.44 is: 121,397.86
Step by Step Solution
- Step 1: Write the proportion equation
151,621.68 : 209,235.60 = 87,970.44 : x - Step 2: Convert to fraction form
151,621.68/209,235.60 = 87,970.44/x - Step 3: Cross multiply
151,621.68x = 209,235.60 × 87,970.44 - Step 4: Simplify right side
151,621.68x = 18,406,547,795.66 - Step 5: Solve for x
x = 18,406,547,795.66/151,621.68 - Step 6: Final answer
x = 121,397.86
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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.