Finding the Fourth Proportional to 39,288,106.55, 54,217,640.81 and 21,406,237.97
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Solution
The fourth proportional to 39,288,106.55, 54,217,640.81 and 21,406,237.97 is: 29,540,637.69
Step by Step Solution
- Step 1: Write the proportion equation
39,288,106.55 : 54,217,640.81 = 21,406,237.97 : x - Step 2: Convert to fraction form
39,288,106.55/54,217,640.81 = 21,406,237.97/x - Step 3: Cross multiply
39,288,106.55x = 54,217,640.81 × 21,406,237.97 - Step 4: Simplify right side
39,288,106.55x = 1,160,595,721,133,271 - Step 5: Solve for x
x = 1,160,595,721,133,271/39,288,106.55 - Step 6: Final answer
x = 29,540,637.69
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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.