Finding the Fourth Proportional to 138,866.85, 191,633.99 and 75,204.09
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Solution
The fourth proportional to 138,866.85, 191,633.99 and 75,204.09 is: 103,780.42
Step by Step Solution
- Step 1: Write the proportion equation
138,866.85 : 191,633.99 = 75,204.09 : x - Step 2: Convert to fraction form
138,866.85/191,633.99 = 75,204.09/x - Step 3: Cross multiply
138,866.85x = 191,633.99 × 75,204.09 - Step 4: Simplify right side
138,866.85x = 14,411,659,455.00 - Step 5: Solve for x
x = 14,411,659,455.00/138,866.85 - Step 6: Final answer
x = 103,780.42
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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.