Finding the Fourth Proportional to 126,780.19, 174,939.35 and 75,781.98
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Solution
The fourth proportional to 126,780.19, 174,939.35 and 75,781.98 is: 104,568.78
Step by Step Solution
- Step 1: Write the proportion equation
126,780.19 : 174,939.35 = 75,781.98 : x - Step 2: Convert to fraction form
126,780.19/174,939.35 = 75,781.98/x - Step 3: Cross multiply
126,780.19x = 174,939.35 × 75,781.98 - Step 4: Simplify right side
126,780.19x = 13,257,249,944.00 - Step 5: Solve for x
x = 13,257,249,944.00/126,780.19 - Step 6: Final answer
x = 104,568.78
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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.