Finding the Fourth Proportional to 90,911.50, 125,576.12 and 69,269.31
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Solution
The fourth proportional to 90,911.50, 125,576.12 and 69,269.31 is: 95,681.75
Step by Step Solution
- Step 1: Write the proportion equation
90,911.50 : 125,576.12 = 69,269.31 : x - Step 2: Convert to fraction form
90,911.50/125,576.12 = 69,269.31/x - Step 3: Cross multiply
90,911.50x = 125,576.12 × 69,269.31 - Step 4: Simplify right side
90,911.50x = 8,698,571,358.05 - Step 5: Solve for x
x = 8,698,571,358.05/90,911.50 - Step 6: Final answer
x = 95,681.75
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.