Finding the Fourth Proportional to 99,878.74, 137,862.21 and 57,467.14
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Solution
The fourth proportional to 99,878.74, 137,862.21 and 57,467.14 is: 79,321.65
Step by Step Solution
- Step 1: Write the proportion equation
99,878.74 : 137,862.21 = 57,467.14 : x - Step 2: Convert to fraction form
99,878.74/137,862.21 = 57,467.14/x - Step 3: Cross multiply
99,878.74x = 137,862.21 × 57,467.14 - Step 4: Simplify right side
99,878.74x = 7,922,546,922.78 - Step 5: Solve for x
x = 7,922,546,922.78/99,878.74 - Step 6: Final answer
x = 79,321.65
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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.