Finding the Fourth Proportional to 131,278.68, 181,162.26 and 74,688.84
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Solution
The fourth proportional to 131,278.68, 181,162.26 and 74,688.84 is: 103,069.28
Step by Step Solution
- Step 1: Write the proportion equation
131,278.68 : 181,162.26 = 74,688.84 : x - Step 2: Convert to fraction form
131,278.68/181,162.26 = 74,688.84/x - Step 3: Cross multiply
131,278.68x = 181,162.26 × 74,688.84 - Step 4: Simplify right side
131,278.68x = 13,530,799,051.18 - Step 5: Solve for x
x = 13,530,799,051.18/131,278.68 - Step 6: Final answer
x = 103,069.28
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.