Finding the Fourth Proportional to 85,673.70, 128,510.55 and 79,841.70
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Solution
The fourth proportional to 85,673.70, 128,510.55 and 79,841.70 is: 119,762.55
Step by Step Solution
- Step 1: Write the proportion equation
85,673.70 : 128,510.55 = 79,841.70 : x - Step 2: Convert to fraction form
85,673.70/128,510.55 = 79,841.70/x - Step 3: Cross multiply
85,673.70x = 128,510.55 × 79,841.70 - Step 4: Simplify right side
85,673.70x = 10,260,500,779.94 - Step 5: Solve for x
x = 10,260,500,779.94/85,673.70 - Step 6: Final answer
x = 119,762.55
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1.5x scale
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.