Finding the Fourth Proportional to 85,879.68, 128,898.81 and 61,888.92
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Solution
The fourth proportional to 85,879.68, 128,898.81 and 61,888.92 is: 92,890.52
Step by Step Solution
- Step 1: Write the proportion equation
85,879.68 : 128,898.81 = 61,888.92 : x - Step 2: Convert to fraction form
85,879.68/128,898.81 = 61,888.92/x - Step 3: Cross multiply
85,879.68x = 128,898.81 × 61,888.92 - Step 4: Simplify right side
85,879.68x = 7,977,408,140.19 - Step 5: Solve for x
x = 7,977,408,140.19/85,879.68 - Step 6: Final answer
x = 92,890.52
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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.