Finding the Fourth Proportional to 168,407.81, 232,396.97 and 100,389.68
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Solution
The fourth proportional to 168,407.81, 232,396.97 and 100,389.68 is: 138,534.29
Step by Step Solution
- Step 1: Write the proportion equation
168,407.81 : 232,396.97 = 100,389.68 : x - Step 2: Convert to fraction form
168,407.81/232,396.97 = 100,389.68/x - Step 3: Cross multiply
168,407.81x = 232,396.97 × 100,389.68 - Step 4: Simplify right side
168,407.81x = 23,330,255,787.34 - Step 5: Solve for x
x = 23,330,255,787.34/168,407.81 - Step 6: Final answer
x = 138,534.29
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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.