Finding the Fourth Proportional to 129,772.68, 179,103.48 and 76,078.80
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Solution
The fourth proportional to 129,772.68, 179,103.48 and 76,078.80 is: 104,998.82
Step by Step Solution
- Step 1: Write the proportion equation
129,772.68 : 179,103.48 = 76,078.80 : x - Step 2: Convert to fraction form
129,772.68/179,103.48 = 76,078.80/x - Step 3: Cross multiply
129,772.68x = 179,103.48 × 76,078.80 - Step 4: Simplify right side
129,772.68x = 13,625,977,834.22 - Step 5: Solve for x
x = 13,625,977,834.22/129,772.68 - Step 6: Final answer
x = 104,998.82
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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.