Finding the Fourth Proportional to 72,972.19, 100,701.80 and 39,438.19
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Solution
The fourth proportional to 72,972.19, 100,701.80 and 39,438.19 is: 54,424.80
Step by Step Solution
- Step 1: Write the proportion equation
72,972.19 : 100,701.80 = 39,438.19 : x - Step 2: Convert to fraction form
72,972.19/100,701.80 = 39,438.19/x - Step 3: Cross multiply
72,972.19x = 100,701.80 × 39,438.19 - Step 4: Simplify right side
72,972.19x = 3,971,496,721.74 - Step 5: Solve for x
x = 3,971,496,721.74/72,972.19 - Step 6: Final answer
x = 54,424.80
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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.