Finding the Fourth Proportional to 77,004,920.80, 115,507,381.20 and 68,345,567.20
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Solution
The fourth proportional to 77,004,920.80, 115,507,381.20 and 68,345,567.20 is: 102,518,350.80
Step by Step Solution
- Step 1: Write the proportion equation
77,004,920.80 : 115,507,381.20 = 68,345,567.20 : x - Step 2: Convert to fraction form
77,004,920.80/115,507,381.20 = 68,345,567.20/x - Step 3: Cross multiply
77,004,920.80x = 115,507,381.20 × 68,345,567.20 - Step 4: Simplify right side
77,004,920.80x = 7,894,417,483,900,617 - Step 5: Solve for x
x = 7,894,417,483,900,617/77,004,920.80 - Step 6: Final answer
x = 102,518,350.80
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1.5x scale
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.