Finding the Fourth Proportional to 103,125.20, 154,428.60 and 76,686.80
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Solution
The fourth proportional to 103,125.20, 154,428.60 and 76,686.80 is: 114,837.45
Step by Step Solution
- Step 1: Write the proportion equation
103,125.20 : 154,428.60 = 76,686.80 : x - Step 2: Convert to fraction form
103,125.20/154,428.60 = 76,686.80/x - Step 3: Cross multiply
103,125.20x = 154,428.60 × 76,686.80 - Step 4: Simplify right side
103,125.20x = 11,842,635,162.48 - Step 5: Solve for x
x = 11,842,635,162.48/103,125.20 - Step 6: Final answer
x = 114,837.45
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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.