Finding the Fourth Proportional to 138,072.24, 190,535.84 and 83,656.63
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Solution
The fourth proportional to 138,072.24, 190,535.84 and 83,656.63 is: 115,443.82
Step by Step Solution
- Step 1: Write the proportion equation
138,072.24 : 190,535.84 = 83,656.63 : x - Step 2: Convert to fraction form
138,072.24/190,535.84 = 83,656.63/x - Step 3: Cross multiply
138,072.24x = 190,535.84 × 83,656.63 - Step 4: Simplify right side
138,072.24x = 15,939,586,268.62 - Step 5: Solve for x
x = 15,939,586,268.62/138,072.24 - Step 6: Final answer
x = 115,443.82
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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.