Finding the Fourth Proportional to 85,691.38, 118,239.96 and 53,837.59
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Solution
The fourth proportional to 85,691.38, 118,239.96 and 53,837.59 is: 74,286.99
Step by Step Solution
- Step 1: Write the proportion equation
85,691.38 : 118,239.96 = 53,837.59 : x - Step 2: Convert to fraction form
85,691.38/118,239.96 = 53,837.59/x - Step 3: Cross multiply
85,691.38x = 118,239.96 × 53,837.59 - Step 4: Simplify right side
85,691.38x = 6,365,754,488.10 - Step 5: Solve for x
x = 6,365,754,488.10/85,691.38 - Step 6: Final answer
x = 74,286.99
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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.