Finding the Fourth Proportional to 88,920.80, 122,727.12 and 57,129.44
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Solution
The fourth proportional to 88,920.80, 122,727.12 and 57,129.44 is: 78,849.17
Step by Step Solution
- Step 1: Write the proportion equation
88,920.80 : 122,727.12 = 57,129.44 : x - Step 2: Convert to fraction form
88,920.80/122,727.12 = 57,129.44/x - Step 3: Cross multiply
88,920.80x = 122,727.12 × 57,129.44 - Step 4: Simplify right side
88,920.80x = 7,011,331,638.41 - Step 5: Solve for x
x = 7,011,331,638.41/88,920.80 - Step 6: Final answer
x = 78,849.17
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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.