Finding the Fourth Proportional to 136,988.14, 189,043.07 and 76,558.74
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Solution
The fourth proportional to 136,988.14, 189,043.07 and 76,558.74 is: 105,650.75
Step by Step Solution
- Step 1: Write the proportion equation
136,988.14 : 189,043.07 = 76,558.74 : x - Step 2: Convert to fraction form
136,988.14/189,043.07 = 76,558.74/x - Step 3: Cross multiply
136,988.14x = 189,043.07 × 76,558.74 - Step 4: Simplify right side
136,988.14x = 14,472,899,748.28 - Step 5: Solve for x
x = 14,472,899,748.28/136,988.14 - Step 6: Final answer
x = 105,650.75
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1.5x scale
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.