Finding the Fourth Proportional to 121,998.21, 168,358.37 and 68,288.19
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Solution
The fourth proportional to 121,998.21, 168,358.37 and 68,288.19 is: 94,238.17
Step by Step Solution
- Step 1: Write the proportion equation
121,998.21 : 168,358.37 = 68,288.19 : x - Step 2: Convert to fraction form
121,998.21/168,358.37 = 68,288.19/x - Step 3: Cross multiply
121,998.21x = 168,358.37 × 68,288.19 - Step 4: Simplify right side
121,998.21x = 11,496,888,017.21 - Step 5: Solve for x
x = 11,496,888,017.21/121,998.21 - Step 6: Final answer
x = 94,238.17
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1.5x scale
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.