Finding the Fourth Proportional to 100,115.63, 138,209.56 and 57,665.96
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Solution
The fourth proportional to 100,115.63, 138,209.56 and 57,665.96 is: 79,607.82
Step by Step Solution
- Step 1: Write the proportion equation
100,115.63 : 138,209.56 = 57,665.96 : x - Step 2: Convert to fraction form
100,115.63/138,209.56 = 57,665.96/x - Step 3: Cross multiply
100,115.63x = 138,209.56 × 57,665.96 - Step 4: Simplify right side
100,115.63x = 7,969,986,641.65 - Step 5: Solve for x
x = 7,969,986,641.65/100,115.63 - Step 6: Final answer
x = 79,607.82
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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.