Finding the Fourth Proportional to 189,405.18, 261,385.43 and 103,368.87
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Solution
The fourth proportional to 189,405.18, 261,385.43 and 103,368.87 is: 142,652.47
Step by Step Solution
- Step 1: Write the proportion equation
189,405.18 : 261,385.43 = 103,368.87 : x - Step 2: Convert to fraction form
189,405.18/261,385.43 = 103,368.87/x - Step 3: Cross multiply
189,405.18x = 261,385.43 × 103,368.87 - Step 4: Simplify right side
189,405.18x = 27,019,116,016.72 - Step 5: Solve for x
x = 27,019,116,016.72/189,405.18 - Step 6: Final answer
x = 142,652.47
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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.