Finding the Fourth Proportional to 138,666.21, 191,185.83 and 115,729.12
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Solution
The fourth proportional to 138,666.21, 191,185.83 and 115,729.12 is: 159,561.35
Step by Step Solution
- Step 1: Write the proportion equation
138,666.21 : 191,185.83 = 115,729.12 : x - Step 2: Convert to fraction form
138,666.21/191,185.83 = 115,729.12/x - Step 3: Cross multiply
138,666.21x = 191,185.83 × 115,729.12 - Step 4: Simplify right side
138,666.21x = 22,125,767,862.37 - Step 5: Solve for x
x = 22,125,767,862.37/138,666.21 - Step 6: Final answer
x = 159,561.35
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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.