Finding the Fourth Proportional to 66,472,391.48, 91,747,205.75 and 38,979,177.08
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Solution
The fourth proportional to 66,472,391.48, 91,747,205.75 and 38,979,177.08 is: 53,800,239.46
Step by Step Solution
- Step 1: Write the proportion equation
66,472,391.48 : 91,747,205.75 = 38,979,177.08 : x - Step 2: Convert to fraction form
66,472,391.48/91,747,205.75 = 38,979,177.08/x - Step 3: Cross multiply
66,472,391.48x = 91,747,205.75 × 38,979,177.08 - Step 4: Simplify right side
66,472,391.48x = 3,576,230,579,163,156.50 - Step 5: Solve for x
x = 3,576,230,579,163,156.50/66,472,391.48 - Step 6: Final answer
x = 53,800,239.46
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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.