Finding the Fourth Proportional to 157,283,235.20, 217,143,970.85 and 139,831,377.05
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Solution
The fourth proportional to 157,283,235.20, 217,143,970.85 and 139,831,377.05 is: 193,050,075.70
Step by Step Solution
- Step 1: Write the proportion equation
157,283,235.20 : 217,143,970.85 = 139,831,377.05 : x - Step 2: Convert to fraction form
157,283,235.20/217,143,970.85 = 139,831,377.05/x - Step 3: Cross multiply
157,283,235.20x = 217,143,970.85 × 139,831,377.05 - Step 4: Simplify right side
157,283,235.20x = 30,363,540,461,361,404 - Step 5: Solve for x
x = 30,363,540,461,361,404/157,283,235.20 - Step 6: Final answer
x = 193,050,075.70
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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.