Finding the Fourth Proportional to 105,516.30, 145,611.57 and 57,117.99
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Solution
The fourth proportional to 105,516.30, 145,611.57 and 57,117.99 is: 78,822.33
Step by Step Solution
- Step 1: Write the proportion equation
105,516.30 : 145,611.57 = 57,117.99 : x - Step 2: Convert to fraction form
105,516.30/145,611.57 = 57,117.99/x - Step 3: Cross multiply
105,516.30x = 145,611.57 × 57,117.99 - Step 4: Simplify right side
105,516.30x = 8,317,040,959.38 - Step 5: Solve for x
x = 8,317,040,959.38/105,516.30 - Step 6: Final answer
x = 78,822.33
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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.