Finding the Fourth Proportional to 135,143.09, 186,489.46 and 74,710.13
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Solution
The fourth proportional to 135,143.09, 186,489.46 and 74,710.13 is: 103,095.55
Step by Step Solution
- Step 1: Write the proportion equation
135,143.09 : 186,489.46 = 74,710.13 : x - Step 2: Convert to fraction form
135,143.09/186,489.46 = 74,710.13/x - Step 3: Cross multiply
135,143.09x = 186,489.46 × 74,710.13 - Step 4: Simplify right side
135,143.09x = 13,932,651,800.23 - Step 5: Solve for x
x = 13,932,651,800.23/135,143.09 - Step 6: Final answer
x = 103,095.55
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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.