Finding the Fourth Proportional to 90,613.08, 135,964.17 and 40,728.42
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Solution
The fourth proportional to 90,613.08, 135,964.17 and 40,728.42 is: 61,112.65
Step by Step Solution
- Step 1: Write the proportion equation
90,613.08 : 135,964.17 = 40,728.42 : x - Step 2: Convert to fraction form
90,613.08/135,964.17 = 40,728.42/x - Step 3: Cross multiply
90,613.08x = 135,964.17 × 40,728.42 - Step 4: Simplify right side
90,613.08x = 5,537,605,820.71 - Step 5: Solve for x
x = 5,537,605,820.71/90,613.08 - Step 6: Final answer
x = 61,112.65
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1.5x scale
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.