Finding the Fourth Proportional to 120,128.93, 165,763.07 and 66,414.99
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Solution
The fourth proportional to 120,128.93, 165,763.07 and 66,414.99 is: 91,644.48
Step by Step Solution
- Step 1: Write the proportion equation
120,128.93 : 165,763.07 = 66,414.99 : x - Step 2: Convert to fraction form
120,128.93/165,763.07 = 66,414.99/x - Step 3: Cross multiply
120,128.93x = 165,763.07 × 66,414.99 - Step 4: Simplify right side
120,128.93x = 11,009,153,548.60 - Step 5: Solve for x
x = 11,009,153,548.60/120,128.93 - Step 6: Final answer
x = 91,644.48
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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.