Finding the Fourth Proportional to 90,478.19, 135,653.70 and 39,853.19
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Solution
The fourth proportional to 90,478.19, 135,653.70 and 39,853.19 is: 59,751.78
Step by Step Solution
- Step 1: Write the proportion equation
90,478.19 : 135,653.70 = 39,853.19 : x - Step 2: Convert to fraction form
90,478.19/135,653.70 = 39,853.19/x - Step 3: Cross multiply
90,478.19x = 135,653.70 × 39,853.19 - Step 4: Simplify right side
90,478.19x = 5,406,232,680.30 - Step 5: Solve for x
x = 5,406,232,680.30/90,478.19 - Step 6: Final answer
x = 59,751.78
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.