Finding the Fourth Proportional to 138,528.54, 191,170.26 and 74,866.19
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Solution
The fourth proportional to 138,528.54, 191,170.26 and 74,866.19 is: 103,315.81
Step by Step Solution
- Step 1: Write the proportion equation
138,528.54 : 191,170.26 = 74,866.19 : x - Step 2: Convert to fraction form
138,528.54/191,170.26 = 74,866.19/x - Step 3: Cross multiply
138,528.54x = 191,170.26 × 74,866.19 - Step 4: Simplify right side
138,528.54x = 14,312,188,051.66 - Step 5: Solve for x
x = 14,312,188,051.66/138,528.54 - Step 6: Final answer
x = 103,315.81
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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.