Finding the Fourth Proportional to 85,660.74, 128,537.28 and 40,671.72
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Solution
The fourth proportional to 85,660.74, 128,537.28 and 40,671.72 is: 61,029.50
Step by Step Solution
- Step 1: Write the proportion equation
85,660.74 : 128,537.28 = 40,671.72 : x - Step 2: Convert to fraction form
85,660.74/128,537.28 = 40,671.72/x - Step 3: Cross multiply
85,660.74x = 128,537.28 × 40,671.72 - Step 4: Simplify right side
85,660.74x = 5,227,832,261.72 - Step 5: Solve for x
x = 5,227,832,261.72/85,660.74 - Step 6: Final answer
x = 61,029.50
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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.