Finding the Fourth Proportional to 129,900.72, 179,276.68 and 76,230.80
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Solution
The fourth proportional to 129,900.72, 179,276.68 and 76,230.80 is: 105,206.54
Step by Step Solution
- Step 1: Write the proportion equation
129,900.72 : 179,276.68 = 76,230.80 : x - Step 2: Convert to fraction form
129,900.72/179,276.68 = 76,230.80/x - Step 3: Cross multiply
129,900.72x = 179,276.68 × 76,230.80 - Step 4: Simplify right side
129,900.72x = 13,666,404,737.74 - Step 5: Solve for x
x = 13,666,404,737.74/129,900.72 - Step 6: Final answer
x = 105,206.54
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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.