Finding the Fourth Proportional to 115,390.97, 159,228.74 and 66,980.05
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Solution
The fourth proportional to 115,390.97, 159,228.74 and 66,980.05 is: 92,426.20
Step by Step Solution
- Step 1: Write the proportion equation
115,390.97 : 159,228.74 = 66,980.05 : x - Step 2: Convert to fraction form
115,390.97/159,228.74 = 66,980.05/x - Step 3: Cross multiply
115,390.97x = 159,228.74 × 66,980.05 - Step 4: Simplify right side
115,390.97x = 10,665,148,736.02 - Step 5: Solve for x
x = 10,665,148,736.02/115,390.97 - Step 6: Final answer
x = 92,426.20
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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.