Finding the Fourth Proportional to 120,811.64, 166,644.68 and 77,848.02
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Solution
The fourth proportional to 120,811.64, 166,644.68 and 77,848.02 is: 107,381.69
Step by Step Solution
- Step 1: Write the proportion equation
120,811.64 : 166,644.68 = 77,848.02 : x - Step 2: Convert to fraction form
120,811.64/166,644.68 = 77,848.02/x - Step 3: Cross multiply
120,811.64x = 166,644.68 × 77,848.02 - Step 4: Simplify right side
120,811.64x = 12,972,957,992.29 - Step 5: Solve for x
x = 12,972,957,992.29/120,811.64 - Step 6: Final answer
x = 107,381.69
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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.