Finding the Fourth Proportional to 138,772.14, 191,504.97 and 78,342.09
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Solution
The fourth proportional to 138,772.14, 191,504.97 and 78,342.09 is: 108,111.75
Step by Step Solution
- Step 1: Write the proportion equation
138,772.14 : 191,504.97 = 78,342.09 : x - Step 2: Convert to fraction form
138,772.14/191,504.97 = 78,342.09/x - Step 3: Cross multiply
138,772.14x = 191,504.97 × 78,342.09 - Step 4: Simplify right side
138,772.14x = 15,002,899,595.19 - Step 5: Solve for x
x = 15,002,899,595.19/138,772.14 - Step 6: Final answer
x = 108,111.75
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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.