Finding the Fourth Proportional to 72,918.05, 109,312.28 and 47,970.05
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Solution
The fourth proportional to 72,918.05, 109,312.28 and 47,970.05 is: 71,912.45
Step by Step Solution
- Step 1: Write the proportion equation
72,918.05 : 109,312.28 = 47,970.05 : x - Step 2: Convert to fraction form
72,918.05/109,312.28 = 47,970.05/x - Step 3: Cross multiply
72,918.05x = 109,312.28 × 47,970.05 - Step 4: Simplify right side
72,918.05x = 5,243,715,297.36 - Step 5: Solve for x
x = 5,243,715,297.36/72,918.05 - Step 6: Final answer
x = 71,912.45
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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.