Finding the Fourth Proportional to 77,136.30, 115,811.52 and 39,723.09
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Solution
The fourth proportional to 77,136.30, 115,811.52 and 39,723.09 is: 59,639.77
Step by Step Solution
- Step 1: Write the proportion equation
77,136.30 : 115,811.52 = 39,723.09 : x - Step 2: Convert to fraction form
77,136.30/115,811.52 = 39,723.09/x - Step 3: Cross multiply
77,136.30x = 115,811.52 × 39,723.09 - Step 4: Simplify right side
77,136.30x = 4,600,391,432.00 - Step 5: Solve for x
x = 4,600,391,432.00/77,136.30 - Step 6: Final answer
x = 59,639.77
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.