Finding the Fourth Proportional to 128,801.58, 193,257.99 and 69,678.87
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Solution
The fourth proportional to 128,801.58, 193,257.99 and 69,678.87 is: 104,548.39
Step by Step Solution
- Step 1: Write the proportion equation
128,801.58 : 193,257.99 = 69,678.87 : x - Step 2: Convert to fraction form
128,801.58/193,257.99 = 69,678.87/x - Step 3: Cross multiply
128,801.58x = 193,257.99 × 69,678.87 - Step 4: Simplify right side
128,801.58x = 13,465,998,361.67 - Step 5: Solve for x
x = 13,465,998,361.67/128,801.58 - Step 6: Final answer
x = 104,548.39
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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.