Finding the Fourth Proportional to 121,728,924.79, 167,887,965.68 and 107,013,126.67
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Solution
The fourth proportional to 121,728,924.79, 167,887,965.68 and 107,013,126.67 is: 147,592,005.50
Step by Step Solution
- Step 1: Write the proportion equation
121,728,924.79 : 167,887,965.68 = 107,013,126.67 : x - Step 2: Convert to fraction form
121,728,924.79/167,887,965.68 = 107,013,126.67/x - Step 3: Cross multiply
121,728,924.79x = 167,887,965.68 × 107,013,126.67 - Step 4: Simplify right side
121,728,924.79x = 17,966,216,137,682,454 - Step 5: Solve for x
x = 17,966,216,137,682,454/121,728,924.79 - Step 6: Final answer
x = 147,592,005.50
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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.