Finding the Fourth Proportional to 128,739.48, 193,162.50 and 69,505.48
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Solution
The fourth proportional to 128,739.48, 193,162.50 and 69,505.48 is: 104,286.99
Step by Step Solution
- Step 1: Write the proportion equation
128,739.48 : 193,162.50 = 69,505.48 : x - Step 2: Convert to fraction form
128,739.48/193,162.50 = 69,505.48/x - Step 3: Cross multiply
128,739.48x = 193,162.50 × 69,505.48 - Step 4: Simplify right side
128,739.48x = 13,425,852,280.50 - Step 5: Solve for x
x = 13,425,852,280.50/128,739.48 - Step 6: Final answer
x = 104,286.99
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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.