Finding the Fourth Proportional to 81,903.99, 122,807.51 and 31,925.75
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Solution
The fourth proportional to 81,903.99, 122,807.51 and 31,925.75 is: 47,869.72
Step by Step Solution
- Step 1: Write the proportion equation
81,903.99 : 122,807.51 = 31,925.75 : x - Step 2: Convert to fraction form
81,903.99/122,807.51 = 31,925.75/x - Step 3: Cross multiply
81,903.99x = 122,807.51 × 31,925.75 - Step 4: Simplify right side
81,903.99x = 3,920,721,208.44 - Step 5: Solve for x
x = 3,920,721,208.44/81,903.99 - Step 6: Final answer
x = 47,869.72
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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.