Finding the Fourth Proportional to 136,977.99, 189,037.09 and 76,548.75
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Solution
The fourth proportional to 136,977.99, 189,037.09 and 76,548.75 is: 105,641.45
Step by Step Solution
- Step 1: Write the proportion equation
136,977.99 : 189,037.09 = 76,548.75 : x - Step 2: Convert to fraction form
136,977.99/189,037.09 = 76,548.75/x - Step 3: Cross multiply
136,977.99x = 189,037.09 × 76,548.75 - Step 4: Simplify right side
136,977.99x = 14,470,552,943.14 - Step 5: Solve for x
x = 14,470,552,943.14/136,977.99 - Step 6: Final answer
x = 105,641.45
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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.