Finding the Fourth Proportional to 129,313.13, 178,452.14 and 72,724.50
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Solution
The fourth proportional to 129,313.13, 178,452.14 and 72,724.50 is: 100,359.82
Step by Step Solution
- Step 1: Write the proportion equation
129,313.13 : 178,452.14 = 72,724.50 : x - Step 2: Convert to fraction form
129,313.13/178,452.14 = 72,724.50/x - Step 3: Cross multiply
129,313.13x = 178,452.14 × 72,724.50 - Step 4: Simplify right side
129,313.13x = 12,977,842,291.81 - Step 5: Solve for x
x = 12,977,842,291.81/129,313.13 - Step 6: Final answer
x = 100,359.82
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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.