Finding the Fourth Proportional to 86,410.20, 129,615.30 and 51,331.80
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Solution
The fourth proportional to 86,410.20, 129,615.30 and 51,331.80 is: 76,997.70
Step by Step Solution
- Step 1: Write the proportion equation
86,410.20 : 129,615.30 = 51,331.80 : x - Step 2: Convert to fraction form
86,410.20/129,615.30 = 51,331.80/x - Step 3: Cross multiply
86,410.20x = 129,615.30 × 51,331.80 - Step 4: Simplify right side
86,410.20x = 6,653,386,656.54 - Step 5: Solve for x
x = 6,653,386,656.54/86,410.20 - Step 6: Final answer
x = 76,997.70
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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.