Finding the Fourth Proportional to 85,430.40, 128,132.40 and 29,257.60
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Solution
The fourth proportional to 85,430.40, 128,132.40 and 29,257.60 is: 43,881.88
Step by Step Solution
- Step 1: Write the proportion equation
85,430.40 : 128,132.40 = 29,257.60 : x - Step 2: Convert to fraction form
85,430.40/128,132.40 = 29,257.60/x - Step 3: Cross multiply
85,430.40x = 128,132.40 × 29,257.60 - Step 4: Simplify right side
85,430.40x = 3,748,846,506.24 - Step 5: Solve for x
x = 3,748,846,506.24/85,430.40 - Step 6: Final answer
x = 43,881.88
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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.