Finding the Fourth Proportional to 128,858.11, 193,209.49 and 57,767.87
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Solution
The fourth proportional to 128,858.11, 193,209.49 and 57,767.87 is: 86,616.99
Step by Step Solution
- Step 1: Write the proportion equation
128,858.11 : 193,209.49 = 57,767.87 : x - Step 2: Convert to fraction form
128,858.11/193,209.49 = 57,767.87/x - Step 3: Cross multiply
128,858.11x = 193,209.49 × 57,767.87 - Step 4: Simplify right side
128,858.11x = 11,161,301,256.32 - Step 5: Solve for x
x = 11,161,301,256.32/128,858.11 - Step 6: Final answer
x = 86,616.99
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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.