Finding the Fourth Proportional to 129,709,292.10, 178,981,163.36 and 77,487,238.59
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Solution
The fourth proportional to 129,709,292.10, 178,981,163.36 and 77,487,238.59 is: 106,921,839.48
Step by Step Solution
- Step 1: Write the proportion equation
129,709,292.10 : 178,981,163.36 = 77,487,238.59 : x - Step 2: Convert to fraction form
129,709,292.10/178,981,163.36 = 77,487,238.59/x - Step 3: Cross multiply
129,709,292.10x = 178,981,163.36 × 77,487,238.59 - Step 4: Simplify right side
129,709,292.10x = 13,868,756,108,630,816 - Step 5: Solve for x
x = 13,868,756,108,630,816/129,709,292.10 - Step 6: Final answer
x = 106,921,839.48
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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.