Finding the Fourth Proportional to 71,319,802.20, 106,979,703.30 and 20,201,155.80
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Solution
The fourth proportional to 71,319,802.20, 106,979,703.30 and 20,201,155.80 is: 30,301,733.70
Step by Step Solution
- Step 1: Write the proportion equation
71,319,802.20 : 106,979,703.30 = 20,201,155.80 : x - Step 2: Convert to fraction form
71,319,802.20/106,979,703.30 = 20,201,155.80/x - Step 3: Cross multiply
71,319,802.20x = 106,979,703.30 × 20,201,155.80 - Step 4: Simplify right side
71,319,802.20x = 2,161,113,653,801,074.25 - Step 5: Solve for x
x = 2,161,113,653,801,074.25/71,319,802.20 - Step 6: Final answer
x = 30,301,733.70
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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.