Finding the Fourth Proportional to 72,583,246.20, 108,874,869.30 and 66,312,679.80
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Solution
The fourth proportional to 72,583,246.20, 108,874,869.30 and 66,312,679.80 is: 99,469,019.70
Step by Step Solution
- Step 1: Write the proportion equation
72,583,246.20 : 108,874,869.30 = 66,312,679.80 : x - Step 2: Convert to fraction form
72,583,246.20/108,874,869.30 = 66,312,679.80/x - Step 3: Cross multiply
72,583,246.20x = 108,874,869.30 × 66,312,679.80 - Step 4: Simplify right side
72,583,246.20x = 7,219,784,346,157,750 - Step 5: Solve for x
x = 7,219,784,346,157,750/72,583,246.20 - Step 6: Final answer
x = 99,469,019.70
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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.