Finding the Fourth Proportional to 139,092,267.20, 208,638,400.80 and 128,342,724.80
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Solution
The fourth proportional to 139,092,267.20, 208,638,400.80 and 128,342,724.80 is: 192,514,087.20
Step by Step Solution
- Step 1: Write the proportion equation
139,092,267.20 : 208,638,400.80 = 128,342,724.80 : x - Step 2: Convert to fraction form
139,092,267.20/208,638,400.80 = 128,342,724.80/x - Step 3: Cross multiply
139,092,267.20x = 208,638,400.80 × 128,342,724.80 - Step 4: Simplify right side
139,092,267.20x = 26,777,220,856,586,500 - Step 5: Solve for x
x = 26,777,220,856,586,500/139,092,267.20 - Step 6: Final answer
x = 192,514,087.20
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.