Finding the Fourth Proportional to 122,136.81, 168,548.84 and 74,390.20
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Solution
The fourth proportional to 122,136.81, 168,548.84 and 74,390.20 is: 102,658.50
Step by Step Solution
- Step 1: Write the proportion equation
122,136.81 : 168,548.84 = 74,390.20 : x - Step 2: Convert to fraction form
122,136.81/168,548.84 = 74,390.20/x - Step 3: Cross multiply
122,136.81x = 168,548.84 × 74,390.20 - Step 4: Simplify right side
122,136.81x = 12,538,381,681.97 - Step 5: Solve for x
x = 12,538,381,681.97/122,136.81 - Step 6: Final answer
x = 102,658.50
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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.