Finding the Fourth Proportional to 139,979.79, 193,174.20 and 76,318.65
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Solution
The fourth proportional to 139,979.79, 193,174.20 and 76,318.65 is: 105,320.88
Step by Step Solution
- Step 1: Write the proportion equation
139,979.79 : 193,174.20 = 76,318.65 : x - Step 2: Convert to fraction form
139,979.79/193,174.20 = 76,318.65/x - Step 3: Cross multiply
139,979.79x = 193,174.20 × 76,318.65 - Step 4: Simplify right side
139,979.79x = 14,742,794,158.83 - Step 5: Solve for x
x = 14,742,794,158.83/139,979.79 - Step 6: Final answer
x = 105,320.88
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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.