Finding the Fourth Proportional to 121,209.21, 181,439.39 and 78,998.49
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Solution
The fourth proportional to 121,209.21, 181,439.39 and 78,998.49 is: 118,253.70
Step by Step Solution
- Step 1: Write the proportion equation
121,209.21 : 181,439.39 = 78,998.49 : x - Step 2: Convert to fraction form
121,209.21/181,439.39 = 78,998.49/x - Step 3: Cross multiply
121,209.21x = 181,439.39 × 78,998.49 - Step 4: Simplify right side
121,209.21x = 14,333,438,034.02 - Step 5: Solve for x
x = 14,333,438,034.02/121,209.21 - Step 6: Final answer
x = 118,253.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.