Finding the Fourth Proportional to 99,668.81, 137,545.70 and 57,230.08
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Solution
The fourth proportional to 99,668.81, 137,545.70 and 57,230.08 is: 78,979.08
Step by Step Solution
- Step 1: Write the proportion equation
99,668.81 : 137,545.70 = 57,230.08 : x - Step 2: Convert to fraction form
99,668.81/137,545.70 = 57,230.08/x - Step 3: Cross multiply
99,668.81x = 137,545.70 × 57,230.08 - Step 4: Simplify right side
99,668.81x = 7,871,750,784.64 - Step 5: Solve for x
x = 7,871,750,784.64/99,668.81 - Step 6: Final answer
x = 78,979.08
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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.