Finding the Fourth Proportional to 75,721.42, 112,688.28 and 73,198.68
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Solution
The fourth proportional to 75,721.42, 112,688.28 and 73,198.68 is: 108,933.95
Step by Step Solution
- Step 1: Write the proportion equation
75,721.42 : 112,688.28 = 73,198.68 : x - Step 2: Convert to fraction form
75,721.42/112,688.28 = 73,198.68/x - Step 3: Cross multiply
75,721.42x = 112,688.28 × 73,198.68 - Step 4: Simplify right side
75,721.42x = 8,248,633,347.47 - Step 5: Solve for x
x = 8,248,633,347.47/75,721.42 - Step 6: Final answer
x = 108,933.95
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.