Finding the Fourth Proportional to 129,430.99, 178,579.86 and 75,729.19
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Solution
The fourth proportional to 129,430.99, 178,579.86 and 75,729.19 is: 104,485.86
Step by Step Solution
- Step 1: Write the proportion equation
129,430.99 : 178,579.86 = 75,729.19 : x - Step 2: Convert to fraction form
129,430.99/178,579.86 = 75,729.19/x - Step 3: Cross multiply
129,430.99x = 178,579.86 × 75,729.19 - Step 4: Simplify right side
129,430.99x = 13,523,708,148.11 - Step 5: Solve for x
x = 13,523,708,148.11/129,430.99 - Step 6: Final answer
x = 104,485.86
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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.