Finding the Fourth Proportional to 142,781.94, 197,034.12 and 79,125.66
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Solution
The fourth proportional to 142,781.94, 197,034.12 and 79,125.66 is: 109,190.66
Step by Step Solution
- Step 1: Write the proportion equation
142,781.94 : 197,034.12 = 79,125.66 : x - Step 2: Convert to fraction form
142,781.94/197,034.12 = 79,125.66/x - Step 3: Cross multiply
142,781.94x = 197,034.12 × 79,125.66 - Step 4: Simplify right side
142,781.94x = 15,590,454,787.52 - Step 5: Solve for x
x = 15,590,454,787.52/142,781.94 - Step 6: Final answer
x = 109,190.66
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1.5x scale
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.