Finding the Fourth Proportional to 221,530,518.28, 305,705,680.50 and 122,409,690.76
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Solution
The fourth proportional to 221,530,518.28, 305,705,680.50 and 122,409,690.76 is: 168,921,817.65
Step by Step Solution
- Step 1: Write the proportion equation
221,530,518.28 : 305,705,680.50 = 122,409,690.76 : x - Step 2: Convert to fraction form
221,530,518.28/305,705,680.50 = 122,409,690.76/x - Step 3: Cross multiply
221,530,518.28x = 305,705,680.50 × 122,409,690.76 - Step 4: Simplify right side
221,530,518.28x = 37,421,337,813,580,360 - Step 5: Solve for x
x = 37,421,337,813,580,360/221,530,518.28 - Step 6: Final answer
x = 168,921,817.65
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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.