Finding the Fourth Proportional to 74,917.50, 103,289.67 and 53,431.74
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Solution
The fourth proportional to 74,917.50, 103,289.67 and 53,431.74 is: 73,666.99
Step by Step Solution
- Step 1: Write the proportion equation
74,917.50 : 103,289.67 = 53,431.74 : x - Step 2: Convert to fraction form
74,917.50/103,289.67 = 53,431.74/x - Step 3: Cross multiply
74,917.50x = 103,289.67 × 53,431.74 - Step 4: Simplify right side
74,917.50x = 5,518,946,792.13 - Step 5: Solve for x
x = 5,518,946,792.13/74,917.50 - Step 6: Final answer
x = 73,666.99
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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.