Finding the Fourth Proportional to 129,479.60, 178,669.07 and 72,116.99
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Solution
The fourth proportional to 129,479.60, 178,669.07 and 72,116.99 is: 99,514.34
Step by Step Solution
- Step 1: Write the proportion equation
129,479.60 : 178,669.07 = 72,116.99 : x - Step 2: Convert to fraction form
129,479.60/178,669.07 = 72,116.99/x - Step 3: Cross multiply
129,479.60x = 178,669.07 × 72,116.99 - Step 4: Simplify right side
129,479.60x = 12,885,075,891.03 - Step 5: Solve for x
x = 12,885,075,891.03/129,479.60 - Step 6: Final answer
x = 99,514.34
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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.