Finding the Fourth Proportional to 85,785.84, 128,684.40 and 29,631.36
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Solution
The fourth proportional to 85,785.84, 128,684.40 and 29,631.36 is: 44,448.99
Step by Step Solution
- Step 1: Write the proportion equation
85,785.84 : 128,684.40 = 29,631.36 : x - Step 2: Convert to fraction form
85,785.84/128,684.40 = 29,631.36/x - Step 3: Cross multiply
85,785.84x = 128,684.40 × 29,631.36 - Step 4: Simplify right side
85,785.84x = 3,813,093,782.78 - Step 5: Solve for x
x = 3,813,093,782.78/85,785.84 - Step 6: Final answer
x = 44,448.99
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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.