Finding the Fourth Proportional to 78,634.12, 108,511.62 and 42,821.99
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Solution
The fourth proportional to 78,634.12, 108,511.62 and 42,821.99 is: 59,092.46
Step by Step Solution
- Step 1: Write the proportion equation
78,634.12 : 108,511.62 = 42,821.99 : x - Step 2: Convert to fraction form
78,634.12/108,511.62 = 42,821.99/x - Step 3: Cross multiply
78,634.12x = 108,511.62 × 42,821.99 - Step 4: Simplify right side
78,634.12x = 4,646,683,506.52 - Step 5: Solve for x
x = 4,646,683,506.52/78,634.12 - Step 6: Final answer
x = 59,092.46
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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.