Finding the Fourth Proportional to 99,781.20, 149,671.80 and 77,473.80
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Solution
The fourth proportional to 99,781.20, 149,671.80 and 77,473.80 is: 116,210.70
Step by Step Solution
- Step 1: Write the proportion equation
99,781.20 : 149,671.80 = 77,473.80 : x - Step 2: Convert to fraction form
99,781.20/149,671.80 = 77,473.80/x - Step 3: Cross multiply
99,781.20x = 149,671.80 × 77,473.80 - Step 4: Simplify right side
99,781.20x = 11,595,643,098.84 - Step 5: Solve for x
x = 11,595,643,098.84/99,781.20 - Step 6: Final answer
x = 116,210.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.