Finding the Fourth Proportional to 129,594.06, 178,834.05 and 72,239.63
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Solution
The fourth proportional to 129,594.06, 178,834.05 and 72,239.63 is: 99,687.48
Step by Step Solution
- Step 1: Write the proportion equation
129,594.06 : 178,834.05 = 72,239.63 : x - Step 2: Convert to fraction form
129,594.06/178,834.05 = 72,239.63/x - Step 3: Cross multiply
129,594.06x = 178,834.05 × 72,239.63 - Step 4: Simplify right side
129,594.06x = 12,918,904,709.23 - Step 5: Solve for x
x = 12,918,904,709.23/129,594.06 - Step 6: Final answer
x = 99,687.48
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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.