Finding the Fourth Proportional to 128,075.96, 176,755.39 and 70,720.98
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Solution
The fourth proportional to 128,075.96, 176,755.39 and 70,720.98 is: 97,600.79
Step by Step Solution
- Step 1: Write the proportion equation
128,075.96 : 176,755.39 = 70,720.98 : x - Step 2: Convert to fraction form
128,075.96/176,755.39 = 70,720.98/x - Step 3: Cross multiply
128,075.96x = 176,755.39 × 70,720.98 - Step 4: Simplify right side
128,075.96x = 12,500,314,401.08 - Step 5: Solve for x
x = 12,500,314,401.08/128,075.96 - Step 6: Final answer
x = 97,600.79
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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.