Finding the Fourth Proportional to 121,867.84, 168,107.52 and 71,557.12
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Solution
The fourth proportional to 121,867.84, 168,107.52 and 71,557.12 is: 98,707.67
Step by Step Solution
- Step 1: Write the proportion equation
121,867.84 : 168,107.52 = 71,557.12 : x - Step 2: Convert to fraction form
121,867.84/168,107.52 = 71,557.12/x - Step 3: Cross multiply
121,867.84x = 168,107.52 × 71,557.12 - Step 4: Simplify right side
121,867.84x = 12,029,289,981.54 - Step 5: Solve for x
x = 12,029,289,981.54/121,867.84 - Step 6: Final answer
x = 98,707.67
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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.