Finding the Fourth Proportional to 102,657.80, 153,986.70 and 85,377.80
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Solution
The fourth proportional to 102,657.80, 153,986.70 and 85,377.80 is: 128,066.70
Step by Step Solution
- Step 1: Write the proportion equation
102,657.80 : 153,986.70 = 85,377.80 : x - Step 2: Convert to fraction form
102,657.80/153,986.70 = 85,377.80/x - Step 3: Cross multiply
102,657.80x = 153,986.70 × 85,377.80 - Step 4: Simplify right side
102,657.80x = 13,147,045,675.26 - Step 5: Solve for x
x = 13,147,045,675.26/102,657.80 - Step 6: Final answer
x = 128,066.70
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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.