Finding the Fourth Proportional to 99,432.87, 137,215.94 and 54,720.87
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Solution
The fourth proportional to 99,432.87, 137,215.94 and 54,720.87 is: 75,514.02
Step by Step Solution
- Step 1: Write the proportion equation
99,432.87 : 137,215.94 = 54,720.87 : x - Step 2: Convert to fraction form
99,432.87/137,215.94 = 54,720.87/x - Step 3: Cross multiply
99,432.87x = 137,215.94 × 54,720.87 - Step 4: Simplify right side
99,432.87x = 7,508,575,341.06 - Step 5: Solve for x
x = 7,508,575,341.06/99,432.87 - Step 6: Final answer
x = 75,514.02
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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.