Finding the Fourth Proportional to 72,695,289.20, 109,102,420.20 and 72,128,418.80
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Solution
The fourth proportional to 72,695,289.20, 109,102,420.20 and 72,128,418.80 is: 108,251,650.73
Step by Step Solution
- Step 1: Write the proportion equation
72,695,289.20 : 109,102,420.20 = 72,128,418.80 : x - Step 2: Convert to fraction form
72,695,289.20/109,102,420.20 = 72,128,418.80/x - Step 3: Cross multiply
72,695,289.20x = 109,102,420.20 × 72,128,418.80 - Step 4: Simplify right side
72,695,289.20x = 7,869,385,056,279,180 - Step 5: Solve for x
x = 7,869,385,056,279,180/72,695,289.20 - Step 6: Final answer
x = 108,251,650.73
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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.