Finding the Fourth Proportional to 112,821.36, 155,510.76 and 76,510.80
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Solution
The fourth proportional to 112,821.36, 155,510.76 and 76,510.80 is: 105,460.99
Step by Step Solution
- Step 1: Write the proportion equation
112,821.36 : 155,510.76 = 76,510.80 : x - Step 2: Convert to fraction form
112,821.36/155,510.76 = 76,510.80/x - Step 3: Cross multiply
112,821.36x = 155,510.76 × 76,510.80 - Step 4: Simplify right side
112,821.36x = 11,898,252,656.21 - Step 5: Solve for x
x = 11,898,252,656.21/112,821.36 - Step 6: Final answer
x = 105,460.99
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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.