Finding the Fourth Proportional to 128,197.05, 176,854.47 and 74,452.95
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Solution
The fourth proportional to 128,197.05, 176,854.47 and 74,452.95 is: 102,711.70
Step by Step Solution
- Step 1: Write the proportion equation
128,197.05 : 176,854.47 = 74,452.95 : x - Step 2: Convert to fraction form
128,197.05/176,854.47 = 74,452.95/x - Step 3: Cross multiply
128,197.05x = 176,854.47 × 74,452.95 - Step 4: Simplify right side
128,197.05x = 13,167,337,012.19 - Step 5: Solve for x
x = 13,167,337,012.19/128,197.05 - Step 6: Final answer
x = 102,711.70
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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.