Finding the Fourth Proportional to 121,028.68, 166,904.94 and 77,435.02
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Solution
The fourth proportional to 121,028.68, 166,904.94 and 77,435.02 is: 106,786.99
Step by Step Solution
- Step 1: Write the proportion equation
121,028.68 : 166,904.94 = 77,435.02 : x - Step 2: Convert to fraction form
121,028.68/166,904.94 = 77,435.02/x - Step 3: Cross multiply
121,028.68x = 166,904.94 × 77,435.02 - Step 4: Simplify right side
121,028.68x = 12,924,287,590.80 - Step 5: Solve for x
x = 12,924,287,590.80/121,028.68 - Step 6: Final answer
x = 106,786.99
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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.