Finding the Fourth Proportional to 208,014.99, 286,969.50 and 121,930.32
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Solution
The fourth proportional to 208,014.99, 286,969.50 and 121,930.32 is: 168,210.40
Step by Step Solution
- Step 1: Write the proportion equation
208,014.99 : 286,969.50 = 121,930.32 : x - Step 2: Convert to fraction form
208,014.99/286,969.50 = 121,930.32/x - Step 3: Cross multiply
208,014.99x = 286,969.50 × 121,930.32 - Step 4: Simplify right side
208,014.99x = 34,990,284,041.38 - Step 5: Solve for x
x = 34,990,284,041.38/208,014.99 - Step 6: Final answer
x = 168,210.40
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1.5x scale
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.