Finding the Fourth Proportional to 129,918.28, 179,209.24 and 78,905.08
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Solution
The fourth proportional to 129,918.28, 179,209.24 and 78,905.08 is: 108,841.65
Step by Step Solution
- Step 1: Write the proportion equation
129,918.28 : 179,209.24 = 78,905.08 : x - Step 2: Convert to fraction form
129,918.28/179,209.24 = 78,905.08/x - Step 3: Cross multiply
129,918.28x = 179,209.24 × 78,905.08 - Step 4: Simplify right side
129,918.28x = 14,140,519,418.94 - Step 5: Solve for x
x = 14,140,519,418.94/129,918.28 - Step 6: Final answer
x = 108,841.65
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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.