Finding the Fourth Proportional to 103,811.80, 155,717.70 and 51,323.80
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Solution
The fourth proportional to 103,811.80, 155,717.70 and 51,323.80 is: 76,985.70
Step by Step Solution
- Step 1: Write the proportion equation
103,811.80 : 155,717.70 = 51,323.80 : x - Step 2: Convert to fraction form
103,811.80/155,717.70 = 51,323.80/x - Step 3: Cross multiply
103,811.80x = 155,717.70 × 51,323.80 - Step 4: Simplify right side
103,811.80x = 7,992,024,091.26 - Step 5: Solve for x
x = 7,992,024,091.26/103,811.80 - Step 6: Final answer
x = 76,985.70
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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.