Finding the Fourth Proportional to 147,639.80, 221,459.70 and 118,115.30
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Solution
The fourth proportional to 147,639.80, 221,459.70 and 118,115.30 is: 177,172.95
Step by Step Solution
- Step 1: Write the proportion equation
147,639.80 : 221,459.70 = 118,115.30 : x - Step 2: Convert to fraction form
147,639.80/221,459.70 = 118,115.30/x - Step 3: Cross multiply
147,639.80x = 221,459.70 × 118,115.30 - Step 4: Simplify right side
147,639.80x = 26,157,778,903.41 - Step 5: Solve for x
x = 26,157,778,903.41/147,639.80 - Step 6: Final answer
x = 177,172.95
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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.