Finding the Fourth Proportional to 102,649.80, 153,974.70 and 85,369.80
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Solution
The fourth proportional to 102,649.80, 153,974.70 and 85,369.80 is: 128,054.70
Step by Step Solution
- Step 1: Write the proportion equation
102,649.80 : 153,974.70 = 85,369.80 : x - Step 2: Convert to fraction form
102,649.80/153,974.70 = 85,369.80/x - Step 3: Cross multiply
102,649.80x = 153,974.70 × 85,369.80 - Step 4: Simplify right side
102,649.80x = 13,144,789,344.06 - Step 5: Solve for x
x = 13,144,789,344.06/102,649.80 - Step 6: Final answer
x = 128,054.70
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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.