Finding the Fourth Proportional to 257,471,114.40, 355,307,670.72 and 139,996,487.70
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Solution
The fourth proportional to 257,471,114.40, 355,307,670.72 and 139,996,487.70 is: 193,193,811.54
Step by Step Solution
- Step 1: Write the proportion equation
257,471,114.40 : 355,307,670.72 = 139,996,487.70 : x - Step 2: Convert to fraction form
257,471,114.40/355,307,670.72 = 139,996,487.70/x - Step 3: Cross multiply
257,471,114.40x = 355,307,670.72 × 139,996,487.70 - Step 4: Simplify right side
257,471,114.40x = 49,741,825,953,668,128 - Step 5: Solve for x
x = 49,741,825,953,668,128/257,471,114.40 - Step 6: Final answer
x = 193,193,811.54
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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.