Finding the Fourth Proportional to 99,697.58, 137,578.84 and 54,985.58
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Solution
The fourth proportional to 99,697.58, 137,578.84 and 54,985.58 is: 75,877.99
Step by Step Solution
- Step 1: Write the proportion equation
99,697.58 : 137,578.84 = 54,985.58 : x - Step 2: Convert to fraction form
99,697.58/137,578.84 = 54,985.58/x - Step 3: Cross multiply
99,697.58x = 137,578.84 × 54,985.58 - Step 4: Simplify right side
99,697.58x = 7,564,852,313.13 - Step 5: Solve for x
x = 7,564,852,313.13/99,697.58 - Step 6: Final answer
x = 75,877.99
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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.