Finding the Fourth Proportional to 128,725.80, 193,088.70 and 119,977.80
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Solution
The fourth proportional to 128,725.80, 193,088.70 and 119,977.80 is: 179,966.70
Step by Step Solution
- Step 1: Write the proportion equation
128,725.80 : 193,088.70 = 119,977.80 : x - Step 2: Convert to fraction form
128,725.80/193,088.70 = 119,977.80/x - Step 3: Cross multiply
128,725.80x = 193,088.70 × 119,977.80 - Step 4: Simplify right side
128,725.80x = 23,166,357,430.86 - Step 5: Solve for x
x = 23,166,357,430.86/128,725.80 - Step 6: Final answer
x = 179,966.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.