Finding the Fourth Proportional to 138,154,649.95, 190,670,135.10 and 78,630,418.52
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Solution
The fourth proportional to 138,154,649.95, 190,670,135.10 and 78,630,418.52 is: 108,519,492.66
Step by Step Solution
- Step 1: Write the proportion equation
138,154,649.95 : 190,670,135.10 = 78,630,418.52 : x - Step 2: Convert to fraction form
138,154,649.95/190,670,135.10 = 78,630,418.52/x - Step 3: Cross multiply
138,154,649.95x = 190,670,135.10 × 78,630,418.52 - Step 4: Simplify right side
138,154,649.95x = 14,992,472,521,224,592 - Step 5: Solve for x
x = 14,992,472,521,224,592/138,154,649.95 - Step 6: Final answer
x = 108,519,492.66
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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.