Finding the Fourth Proportional to 100,821.95, 139,129.51 and 55,498.99
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Solution
The fourth proportional to 100,821.95, 139,129.51 and 55,498.99 is: 76,585.97
Step by Step Solution
- Step 1: Write the proportion equation
100,821.95 : 139,129.51 = 55,498.99 : x - Step 2: Convert to fraction form
100,821.95/139,129.51 = 55,498.99/x - Step 3: Cross multiply
100,821.95x = 139,129.51 × 55,498.99 - Step 4: Simplify right side
100,821.95x = 7,721,547,284.19 - Step 5: Solve for x
x = 7,721,547,284.19/100,821.95 - Step 6: Final answer
x = 76,585.97
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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.