Finding the Fourth Proportional to 136,963.49, 189,009.20 and 76,534.19
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Solution
The fourth proportional to 136,963.49, 189,009.20 and 76,534.19 is: 105,616.95
Step by Step Solution
- Step 1: Write the proportion equation
136,963.49 : 189,009.20 = 76,534.19 : x - Step 2: Convert to fraction form
136,963.49/189,009.20 = 76,534.19/x - Step 3: Cross multiply
136,963.49x = 189,009.20 × 76,534.19 - Step 4: Simplify right side
136,963.49x = 14,465,666,024.55 - Step 5: Solve for x
x = 14,465,666,024.55/136,963.49 - Step 6: Final answer
x = 105,616.95
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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.