Finding the Fourth Proportional to 86,657.20, 129,985.80 and 49,202.80
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Solution
The fourth proportional to 86,657.20, 129,985.80 and 49,202.80 is: 73,804.20
Step by Step Solution
- Step 1: Write the proportion equation
86,657.20 : 129,985.80 = 49,202.80 : x - Step 2: Convert to fraction form
86,657.20/129,985.80 = 49,202.80/x - Step 3: Cross multiply
86,657.20x = 129,985.80 × 49,202.80 - Step 4: Simplify right side
86,657.20x = 6,395,665,320.24 - Step 5: Solve for x
x = 6,395,665,320.24/86,657.20 - Step 6: Final answer
x = 73,804.20
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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.