Finding the Fourth Proportional to 129,569.49, 193,915.35 and 79,681.23
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Solution
The fourth proportional to 129,569.49, 193,915.35 and 79,681.23 is: 119,251.94
Step by Step Solution
- Step 1: Write the proportion equation
129,569.49 : 193,915.35 = 79,681.23 : x - Step 2: Convert to fraction form
129,569.49/193,915.35 = 79,681.23/x - Step 3: Cross multiply
129,569.49x = 193,915.35 × 79,681.23 - Step 4: Simplify right side
129,569.49x = 15,451,413,603.88 - Step 5: Solve for x
x = 15,451,413,603.88/129,569.49 - Step 6: Final answer
x = 119,251.94
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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.