Finding the Fourth Proportional to 157,837.76, 217,814.80 and 86,217.80
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Solution
The fourth proportional to 157,837.76, 217,814.80 and 86,217.80 is: 118,979.85
Step by Step Solution
- Step 1: Write the proportion equation
157,837.76 : 217,814.80 = 86,217.80 : x - Step 2: Convert to fraction form
157,837.76/217,814.80 = 86,217.80/x - Step 3: Cross multiply
157,837.76x = 217,814.80 × 86,217.80 - Step 4: Simplify right side
157,837.76x = 18,779,512,863.44 - Step 5: Solve for x
x = 18,779,512,863.44/157,837.76 - Step 6: Final answer
x = 118,979.85
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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.