Finding the Fourth Proportional to 77,315.22, 106,909.74 and 61,371.99
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Solution
The fourth proportional to 77,315.22, 106,909.74 and 61,371.99 is: 84,863.80
Step by Step Solution
- Step 1: Write the proportion equation
77,315.22 : 106,909.74 = 61,371.99 : x - Step 2: Convert to fraction form
77,315.22/106,909.74 = 61,371.99/x - Step 3: Cross multiply
77,315.22x = 106,909.74 × 61,371.99 - Step 4: Simplify right side
77,315.22x = 6,561,263,494.18 - Step 5: Solve for x
x = 6,561,263,494.18/77,315.22 - Step 6: Final answer
x = 84,863.80
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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.