Finding the Fourth Proportional to 138,156,394.99, 190,672,545.36 and 78,632,164.48
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Solution
The fourth proportional to 138,156,394.99, 190,672,545.36 and 78,632,164.48 is: 108,521,903.38
Step by Step Solution
- Step 1: Write the proportion equation
138,156,394.99 : 190,672,545.36 = 78,632,164.48 : x - Step 2: Convert to fraction form
138,156,394.99/190,672,545.36 = 78,632,164.48/x - Step 3: Cross multiply
138,156,394.99x = 190,672,545.36 × 78,632,164.48 - Step 4: Simplify right side
138,156,394.99x = 14,992,994,948,567,782 - Step 5: Solve for x
x = 14,992,994,948,567,782/138,156,394.99 - Step 6: Final answer
x = 108,521,903.38
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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.