Finding the Fourth Proportional to 139,968,138.90, 209,952,208.35 and 78,746,135.70
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Solution
The fourth proportional to 139,968,138.90, 209,952,208.35 and 78,746,135.70 is: 118,119,203.55
Step by Step Solution
- Step 1: Write the proportion equation
139,968,138.90 : 209,952,208.35 = 78,746,135.70 : x - Step 2: Convert to fraction form
139,968,138.90/209,952,208.35 = 78,746,135.70/x - Step 3: Cross multiply
139,968,138.90x = 209,952,208.35 × 78,746,135.70 - Step 4: Simplify right side
139,968,138.90x = 16,532,925,089,243,774 - Step 5: Solve for x
x = 16,532,925,089,243,774/139,968,138.90 - Step 6: Final answer
x = 118,119,203.55
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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.