Finding the Fourth Proportional to 129,420.10, 178,598.04 and 74,979.69
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Solution
The fourth proportional to 129,420.10, 178,598.04 and 74,979.69 is: 103,470.99
Step by Step Solution
- Step 1: Write the proportion equation
129,420.10 : 178,598.04 = 74,979.69 : x - Step 2: Convert to fraction form
129,420.10/178,598.04 = 74,979.69/x - Step 3: Cross multiply
129,420.10x = 178,598.04 × 74,979.69 - Step 4: Simplify right side
129,420.10x = 13,391,225,673.81 - Step 5: Solve for x
x = 13,391,225,673.81/129,420.10 - Step 6: Final answer
x = 103,470.99
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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.